diff --git a/ui (gen4)/features/cli.js b/ui (gen4)/features/cli.js
index 56853547..46534b0f 100755
--- a/ui (gen4)/features/cli.js	
+++ b/ui (gen4)/features/cli.js	
@@ -93,7 +93,7 @@ module.CLI = core.ImageGridFeatures.Feature({
 	],
 
 	isApplicable: function(){ 
-		return this.runtime == 'node' || this.runtime == 'nw' },
+		return this.runtime == 'node' /*|| this.runtime == 'nw'*/ },
 
 	actions: CLIActions,
 
diff --git a/ui (gen4)/features/core.js b/ui (gen4)/features/core.js
index 5736a8d5..c3b99615 100755
--- a/ui (gen4)/features/core.js	
+++ b/ui (gen4)/features/core.js	
@@ -189,6 +189,7 @@ var LifeCycleActions = actions.Actions({
 			// other...
 			} else {
 				// XXX
+				console.warn('Unknown runtime:', runtime)
 			}
 		}],
 	// unbind events...
@@ -202,16 +203,14 @@ var LifeCycleActions = actions.Actions({
 
 			// nw...
 			if(this.__nw_stop_handler && this.runtime == 'nw'){
-				//nw.Window.get().off('close', this.__nw_stop_handler)
+				nw.Window.get().removeAllListeners('close')
 				delete this.__nw_stop_handler
 			}
 
 			// node...
-			/* XXX there's no process.off(...)
 			if(this.__stop_handler && this.runtime == 'node'){
-				process.off('exit', this.__stop_handler)
+				process.removeAllListeners('exit')
 			}
-			*/
 
 			delete this.__stop_handler
 
diff --git a/ui (gen4)/features/keyboard.js b/ui (gen4)/features/keyboard.js
index 63fc7110..47ae93eb 100755
--- a/ui (gen4)/features/keyboard.js	
+++ b/ui (gen4)/features/keyboard.js	
@@ -396,7 +396,7 @@ var KeyboardActions = actions.Actions({
 					this.__keyboard_handler =
 						keyboard.makeKeyboardHandler(
 							function(){ return that.__keyboard_config },
-							function(k){ window.DEBUG && console.log(k) }, 
+							function(k){ window.DEBUG && console.log('KEY:', k) }, 
 							this)
 
 				// drop keys if repeating too fast...
diff --git a/ui (gen4)/imagegrid/data.js b/ui (gen4)/imagegrid/data.js
index 43c3cbee..9356892e 100755
--- a/ui (gen4)/imagegrid/data.js	
+++ b/ui (gen4)/imagegrid/data.js	
@@ -2227,7 +2227,7 @@ var DataPrototype = {
 
 		// split the data into three sections...
 		var res = this.split(start, end)
-		var rest = res.splice(1)
+		var rest = res.shift()
 
 		// set the base ribbon on the middle section...
 		rest[0].setBase(0)
diff --git a/ui (gen4)/imagegrid/ribbons.js b/ui (gen4)/imagegrid/ribbons.js
index 753b381c..9c9293b2 100755
--- a/ui (gen4)/imagegrid/ribbons.js	
+++ b/ui (gen4)/imagegrid/ribbons.js	
@@ -230,6 +230,7 @@ var RibbonsClassPrototype = {
 	createViewer: function(){
 		return $('<div>')
 			.addClass('viewer')
+			.attr('tabindex', 0)
 			//.append($('<div>')
 			//	.addClass('ribbon-set'))
 	},
diff --git a/ui (gen4)/index.html b/ui (gen4)/index.html
index ed85ddac..81dde0f0 100755
--- a/ui (gen4)/index.html	
+++ b/ui (gen4)/index.html	
@@ -88,7 +88,7 @@ if(window.require && window.nw){
 
 <!--/div-->
 
-<div class="viewer gray marks-visible"></div>
+<div class="viewer gray marks-visible" tabindex="0"></div>
 
 
 <!-- vim:set ts=4 sw=4 spell : -->
diff --git a/ui (gen4)/lib/preview.js b/ui (gen4)/lib/preview.js
index 4e839c1a..97b9107d 100755
--- a/ui (gen4)/lib/preview.js	
+++ b/ui (gen4)/lib/preview.js	
@@ -104,9 +104,6 @@ function(images, sizes, base_path, target_tpl, callback){
 						return img.clone()
 							.resize(res, res)
 							.max()
-							// XXX this causes odd image errors 
-							// 		...white pixels in random black areas...	
-							//.interpolateWith('nohalo')
 							.withMetadata()
 							.toFile(full)
 								.then(function(){
diff --git a/ui (gen4)/package.json b/ui (gen4)/package.json
index db916543..dcede913 100755
--- a/ui (gen4)/package.json	
+++ b/ui (gen4)/package.json	
@@ -25,7 +25,7 @@
     "guarantee-events": "^1.0.0",
     "openseadragon": "^2.1.0",
     "requirejs": "^2.1.23",
-    "sharp": "^0.12.0"
+    "sharp": "^0.15.0"
   },
   "optionalDependencies": {
     "flickrapi": "^0.3.28"
diff --git a/ui (gen4)/ui.js b/ui (gen4)/ui.js
index d832ffc0..3c623146 100755
--- a/ui (gen4)/ui.js	
+++ b/ui (gen4)/ui.js	
@@ -71,6 +71,8 @@ $(function(){
 				// XXX this is not for production...
 				'experiments',
 
+				//'-commandline',
+
 				// XXX BUG: disabling features on this level does not 
 				// 		work, yet works deeper down...
 				// 			Example: