diff --git a/ui (gen4)/css/layout.less b/ui (gen4)/css/layout.less
index 16d64985..7694a0b8 100755
--- a/ui (gen4)/css/layout.less	
+++ b/ui (gen4)/css/layout.less	
@@ -1891,6 +1891,8 @@ progress:not(value)::-webkit-progress-bar {
 
 .single-image-mode.viewer .ribbon {
 	background-color: transparent;
+
+	will-change: auto;
 }
 .single-image-mode.viewer .current-marker {
 	/* NOTE: !important here fixes the jQuery habit of explicitly 
diff --git a/ui (gen4)/features/base.js b/ui (gen4)/features/base.js
index 68e6b45b..21097d83 100755
--- a/ui (gen4)/features/base.js	
+++ b/ui (gen4)/features/base.js	
@@ -947,11 +947,10 @@ module.Base = core.ImageGridFeatures.Feature({
 			}],
 		['prepareJSONForLoad',
 			function(res, json, base_path){
-				console.log('>>>>', res, json, base_path)
-
 				// build data and images...
 				// XXX do we actually need to build stuff here, shouldn't
 				// 		.load(..) take care of this???
+				//var d = json.data
 				var d = data.Data.fromJSON(json.data)
 
 				d.current = json.current || d.current
diff --git a/ui (gen4)/imagegrid/data.js b/ui (gen4)/imagegrid/data.js
index 18d0f694..73d10861 100755
--- a/ui (gen4)/imagegrid/data.js	
+++ b/ui (gen4)/imagegrid/data.js	
@@ -2530,6 +2530,7 @@ var DataPrototype = {
 	// NOTE: this loads in-place, use .fromJSON(..) to create new data...
 	// XXX should this process defaults for unset values???
 	loadJSON: function(data){
+		var that = this
 		data = typeof(data) == typeof('str') ? JSON.parse(data) : data
 		data = formats.updateData(data)
 		this.base = data.base
@@ -2538,7 +2539,6 @@ var DataPrototype = {
 		this.ribbon_order = data.ribbon_order.slice()
 
 		// make sparse lists...
-		var that = this
 		this.__gid_lists.forEach(function(s){
 			if(data[s] == null){
 				return
diff --git a/ui (gen4)/imagegrid/formats.js b/ui (gen4)/imagegrid/formats.js
index 53ea8032..b121db1a 100755
--- a/ui (gen4)/imagegrid/formats.js	
+++ b/ui (gen4)/imagegrid/formats.js	
@@ -139,11 +139,20 @@ module.getLatestUpdaterVersion = function(){
 // format.
 // NOTE: if data is already in the latest format this will return it 
 // 		as-is.
-module.updateData = function(data){
+module.updateData = function(data, clean){
 	var v = module.getLatestUpdaterVersion()
-	return data.version < v
+	var res = data.version < v
 		? module.VERSIONS[v](data) 
 		: data
+
+	!clean
+		&& Object.keys(data).forEach(function(k){
+			if(res[k] == null){
+				res[k] = data[k]
+			}
+		})
+
+	return res
 }