diff --git a/ui (gen4)/features/base.js b/ui (gen4)/features/base.js
index 9258caaf..1653fcec 100755
--- a/ui (gen4)/features/base.js	
+++ b/ui (gen4)/features/base.js	
@@ -1135,8 +1135,8 @@ module.TagsEditActions = actions.Actions({
 		{journal: true},
 		function(tags, gids){
 			gids = gids || this.current
-			gids = gids.constructor !== Array ? [gids] : gids
-			tags = tags.constructor !== Array ? [tags] : tags
+			gids = gids instanceof Array ? gids : [gids]
+			tags = tags instanceof Array ? tags : [tags]
 
 			var that = this
 			gids = gids.map(function(gid){ return that.data.getImage(gid) })
@@ -1165,8 +1165,8 @@ module.TagsEditActions = actions.Actions({
 		{journal: true},
 		function(tags, gids){
 			gids = gids || this.current
-			gids = gids.constructor !== Array ? [gids] : gids
-			tags = tags.constructor !== Array ? [tags] : tags
+			gids = gids instanceof Array ? gids : [gids]
+			tags = tags instanceof Array ? tags : [tags]
 
 			// data...
 			this.data.untag(tags, gids)
@@ -1258,13 +1258,13 @@ module.TagsEdit = core.ImageGridFeatures.Feature({
 				var changes = []
 
 				gids = gids || [this.data.getImage()]
-				gids = gids.constructor !== Array ? 
-					[this.data.getImage(gids)] 
-					: gids
+				gids = gids instanceof Array ? 
+					gids
 						.map(function(e){ return that.data.getImage(e) })
+					: [this.data.getImage(gids)] 
 
 				tags = tags || []
-				tags = tags.constructor !== Array ? [tags] : tags
+				tags = tags instanceof Array ? tags : [tags]
 
 				// tags...
 				if(tags.length > 0){
diff --git a/ui (gen4)/features/collections.js b/ui (gen4)/features/collections.js
index 7853c4b2..8b7badb1 100755
--- a/ui (gen4)/features/collections.js	
+++ b/ui (gen4)/features/collections.js	
@@ -1025,6 +1025,15 @@ module.CollectionTags = core.ImageGridFeatures.Feature({
 // 		only???
 // XXX do we need real tag queries???
 var AutoTagCollectionsActions = actions.Actions({
+	config: {
+		// Can be:
+		// 	'ignore-local' (default)
+		// 	'main-collection-local'
+		//'auto-collection-tags-mode': 'ignore-local',
+		'auto-collection-tags-mode': 'main-collection-local',
+	},
+
+
 	collectionAutoTagsLoader: ['- Collections/',
 		core.doc`
 
@@ -1034,16 +1043,17 @@ var AutoTagCollectionsActions = actions.Actions({
 		{collectionFormat: 'tag_query'},
 		function(title, state){ 
 			return new Promise((function(resolve){
+				var local_tags_mode = this.config['auto-collection-tags-mode'] || 'ignore-local'
 				var local_tag_names = this.config['collection-local-tags'] || []
 
 				var tags = (state.tag_query || [])
-					// filter out local tags...
-					.filter(function(tag){ return local_tag_names.indexOf(tag) < 0 })
+					.filter(function(tag){ 
+						return local_tag_names.indexOf(tag) < 0 })
 
 				// XXX should this be a real tag query???
 				var gids = this.data.getTaggedByAll(tags)
 
-				// get unmatching...
+				// get items that topped matching the query...
 				var remove = state.data ?
 					state.data.order
 						.filter(function(gid){ return gids.indexOf(gid) < 0 })
diff --git a/ui (gen4)/features/core.js b/ui (gen4)/features/core.js
index 0680b11a..f2fcfdd7 100755
--- a/ui (gen4)/features/core.js	
+++ b/ui (gen4)/features/core.js	
@@ -84,7 +84,7 @@ function(attr, states, a, b){
 
 	return toggler.Toggler(null,
 		function(_, action){
-			var lst = states.constructor === Array ? states 
+			var lst = states instanceof Array ? states 
 				: states instanceof Function ? states.call(this)
 				: states
 
diff --git a/ui (gen4)/features/marks.js b/ui (gen4)/features/marks.js
index 2f3870e3..e05961b6 100755
--- a/ui (gen4)/features/marks.js	
+++ b/ui (gen4)/features/marks.js	
@@ -44,7 +44,7 @@ function makeTagTogglerAction(tag){
 					? this.data.getImages(target)
 			: target == 'ribbon' ? this.data.getImages('current')
 			: target
-		return target.constructor !== Array ? [target] : target
+		return target instanceof Array ? target : [target]
 	}
 
 	// the toggler...
diff --git a/ui (gen4)/features/ui-ribbons.js b/ui (gen4)/features/ui-ribbons.js
index b9ab9132..dafdf469 100755
--- a/ui (gen4)/features/ui-ribbons.js	
+++ b/ui (gen4)/features/ui-ribbons.js	
@@ -506,7 +506,7 @@ actions.Actions({
 	// tags...
 	tag: [ 
 		function(tags, gids){ 
-			gids = gids != null && gids.constructor !== Array ? [gids] : gids
+			gids = (gids instanceof Array || gids == null) ? gids : [gids]
 			return function(){
 				//this.ribbons.updateImage(gids) 
 				this.refresh(gids)
@@ -514,7 +514,7 @@ actions.Actions({
 		}],
 	untag: [
 		function(tags, gids){ 
-			gids = gids != null && gids.constructor !== Array ? [gids] : gids
+			gids = (gids instanceof Array || gids == null) ? gids : [gids]
 			return function(){
 				//this.ribbons.updateImage(gids) 
 				this.refresh(gids)
@@ -780,7 +780,7 @@ module.ShiftAnimation = core.ImageGridFeatures.Feature({
 		['shiftImageUp.pre shiftImageDown.pre',
 			function(target){
 				// XXX do not do target lists...
-				if(target != null && target.constructor === Array 
+				if(target != null && target instanceof Array 
 						// do not animate in single image mode...
 						&& this.toggleSingleImage('?') == 'on'){
 					return
@@ -796,7 +796,7 @@ module.ShiftAnimation = core.ImageGridFeatures.Feature({
 		['shiftImageLeft.pre shiftImageRight.pre', 
 			function(target){
 				// XXX do not do target lists...
-				if(target != null && target.constructor === Array
+				if(target != null && target instanceof Array
 						// do not animate in single image mode...
 						&& this.toggleSingleImage('?') == 'on'){
 					return
diff --git a/ui (gen4)/features/ui-status.js b/ui (gen4)/features/ui-status.js
index cca26160..c23ccad4 100755
--- a/ui (gen4)/features/ui-status.js	
+++ b/ui (gen4)/features/ui-status.js	
@@ -694,7 +694,7 @@ module.StatusBar = core.ImageGridFeatures.Feature({
 		],
 			function(res, tags, gids){
 				// trigger only when current image is affected...
-				if(gids.constructor === Array 
+				if(gids instanceof Array 
 						&& (gids.indexOf('current') >= 0 
 							|| gids.indexOf(this.current) >= 0)
 						|| this.data.getImage(gids) == this.current){
diff --git a/ui (gen4)/imagegrid/data.js b/ui (gen4)/imagegrid/data.js
index 6b798994..c20e3f94 100755
--- a/ui (gen4)/imagegrid/data.js	
+++ b/ui (gen4)/imagegrid/data.js	
@@ -811,7 +811,7 @@ var DataPrototype = {
 		}
 
 		// normalize target...
-		if(target in this.ribbons || target.constructor === Array){
+		if(target in this.ribbons || target instanceof Array){
 			list = target
 			target = this.current
 		} else if(['before', 'after', 'next', 'prev'].indexOf(target) >= 0){
@@ -829,7 +829,7 @@ var DataPrototype = {
 
 		// normalize mode...
 		if(mode != null 
-				&& mode.constructor === Array
+				&& mode instanceof Array
 				|| mode in this.ribbons){
 			list = mode
 			mode = null
@@ -864,7 +864,7 @@ var DataPrototype = {
 						|| this.getRibbon(this.getImage(target, 'after', this.getImages()))]
 			: list == 'global' ?
 				this.order
-			: list.constructor === Array ? 
+			: list instanceof Array ? 
 				this.makeSparseImages(list)
 			: this.ribbons[this.getRibbon(list)]
 
@@ -1056,7 +1056,7 @@ var DataPrototype = {
 			target = null 
 
 		// filter out the unloaded gids from given list...
-		} else if(target != null && target.constructor === Array){
+		} else if(target != null && target instanceof Array){
 			var loaded = count == 'current' ? this.getImages('current')
 				: count in this.ribbons ? this.ribbons[count].compact()
 				: typeof(count) == typeof(123) ? 
@@ -1455,7 +1455,7 @@ var DataPrototype = {
 			mode = from
 			from = null
 		}
-		from = from != null && from.constructor !== Array ? [from] : from
+		from = from == null || from instanceof Array ? from : [from]
 
 		var r = this.getRibbon('current')
 
@@ -1786,7 +1786,7 @@ var DataPrototype = {
 		if(from == null){
 			return
 		}
-		from = from.constructor !== Array ? [from] : from
+		from = from instanceof Array ? from : [from]
 
 		var place
 
@@ -1832,7 +1832,7 @@ var DataPrototype = {
 	// 		ribbon above or the top ribbon...
 	shiftImageUp: function(gid){ 
 		gid = gid || this.current
-		var g = gid && gid.constructor === Array ? gid[0] : gid
+		var g = gid && gid instanceof Array ? gid[0] : gid
 		var r = this.getRibbonOrder(g)
 		// check if we need to create a ribbon here...
 		if(r == 0){
@@ -1852,7 +1852,7 @@ var DataPrototype = {
 	},
 	shiftImageDown: function(gid){ 
 		gid = gid || this.current
-		var g = gid && gid.constructor === Array ? gid[0] : gid
+		var g = gid && gid instanceof Array ? gid[0] : gid
 		var r = this.getRibbonOrder(g)
 		// check if we need to create a ribbon here...
 		if(r == this.ribbon_order.length-1){
@@ -2022,7 +2022,7 @@ var DataPrototype = {
 	// XXX test if generated gid is unique...
 	group: function(gids, group){
 		gids = gids == null ? this.getImage() : gids
-		gids = gids.constructor !== Array ? [gids] : gids
+		gids = gids instanceof Array ? gids : [gids]
 		// XXX not safe -- fast enough and one can generate two identical
 		// 		gids...
 		group = group == null ? this.newGid('G' + Date.now()) : group
@@ -2107,7 +2107,7 @@ var DataPrototype = {
 		groups = groups == null ? this.getGroup()
 			: groups == 'all' || groups == '*' ? Object.keys(this.groups)
 			: groups
-		groups = groups.constructor !== Array ? [groups] : groups
+		groups = groups instanceof Array ? groups : [groups]
 
 		var that = this
 		groups.forEach(function(group){
@@ -2152,7 +2152,7 @@ var DataPrototype = {
 		groups = groups == null ? this.getGroup() 
 			: groups == 'all' || groups == '*' ? Object.keys(this.groups)
 			: groups
-		groups = groups.constructor !== Array ? [groups] : groups
+		groups = groups instanceof Array ? groups : [groups]
 		safe = safe || false
 
 		var that = this
@@ -2284,12 +2284,10 @@ var DataPrototype = {
 	// 		.getImage(..)
 	// NOTE: if no target is given this will assume the current image.
 	split: function(target){
-		if(arguments.length > 1){
-			target = Array.apply(null, arguments)
-		} else if(target == null 
-				|| target.constructor !== Array){
-			target = [ target ]
-		}
+		target = argument.length > 1 ? [].slice.call(arguments)
+			: target == null || target instanceof Array ? target
+			: [target]
+
 		var res = []
 		var tail = this.clone()
 		var that = this
@@ -2348,7 +2346,7 @@ var DataPrototype = {
 			args.shift() 
 			: 'base'
 		align = align || 'base'
-		args = args[0].constructor === Array ? args[0] : args
+		args = args[0] instanceof Array ? args[0] : args
 
 		var base = this
 
@@ -2991,10 +2989,10 @@ var DataWithTagsPrototype = {
 	},
 
 	tag: function(tags, gids){
-		tags = tags.constructor !== Array ? [tags] : tags
+		tags = tags instanceof Array ? tags : [tags]
 
 		gids = gids == null || gids == 'current' ? this.getImage() : gids
-		gids = gids.constructor !== Array ? [gids] : gids
+		gids = gids instanceof Array ? gids : [gids]
 
 		if(this.tags == null){
 			this.tags = {}
@@ -3019,10 +3017,10 @@ var DataWithTagsPrototype = {
 		if(this.tags == null){
 			return this
 		}
-		tags = tags.constructor !== Array ? [tags] : tags
+		tags = tags instanceof Array ? tags : [tags]
 
 		gids = gids == null || gids == 'current' ? this.getImage() : gids
-		gids = gids.constructor !== Array ? [gids] : gids
+		gids = gids instanceof Array ? gids : [gids]
 
 		var that = this
 		var tagset = this.tags
@@ -3046,7 +3044,7 @@ var DataWithTagsPrototype = {
 	// NOTE: this does not support multiple tags at this point...
 	toggleTag: function(tag, gids, action){
 		gids = gids == null || gids == 'current' ? this.getImage() : gids
-		gids = gids.constructor !== Array ? [gids] : gids
+		gids = gids instanceof Array ? gids : [gids]
 
 		// tag all...
 		if(action == 'on'){
@@ -3099,10 +3097,11 @@ var DataWithTagsPrototype = {
 	},
 
 	getTags: function(gids){
-		gids = arguments.length > 1 ? [].slice.call(arguments) : gids
-		gids = gids == null || gids == 'current' ? this.getImage() : gids
+		gids = arguments.length > 1 ? [].slice.call(arguments) 
+			: gids == null || gids == 'current' ? this.getImage() 
+			: gids
 		gids = gids == null ? [] : gids
-		gids = gids.constructor !== Array ? [gids] : gids
+		gids = gids instanceof Array ? gids : [gids]
 
 		if(this.tags == null){
 			return []
@@ -3125,7 +3124,7 @@ var DataWithTagsPrototype = {
 	// selectors...
 	getTaggedByAny: function(tags){
 		tags = arguments.length > 1 ? [].slice.call(arguments) : tags
-		tags = tags.constructor !== Array ? [tags] : tags
+		gids = gids instanceof Array ? gids : [gids]
 
 		var res = []
 
@@ -3145,7 +3144,7 @@ var DataWithTagsPrototype = {
 	},
 	getTaggedByAll: function(tags){
 		tags = arguments.length > 1 ? [].slice.call(arguments) : tags
-		tags = tags.constructor !== Array ? [tags] : tags
+		tags = tags instanceof Array ? tags : [tags]
 
 		if(this.tags == null){
 			return []