diff --git a/ui (gen4)/features/metadata.js b/ui (gen4)/features/metadata.js
index 02b03956..339134be 100755
--- a/ui (gen4)/features/metadata.js	
+++ b/ui (gen4)/features/metadata.js	
@@ -484,8 +484,8 @@ var MetadataUIActions = actions.Actions({
 					cls: 'table-view metadata-view',
 					showDisabled: false,
 				})
-				.on('attached', function(){
-					this.updatePreview() })
+				.on('attached', function(){ this.updatePreview() })
+				.on('update', function(){ this.updatePreview() })
 				// select value of current item...
 				.on('select', function(evt, elem){
 					that.config['metadata-auto-select-mode'] == 'on select'
diff --git a/ui (gen4)/features/virtual-blocks.js b/ui (gen4)/features/virtual-blocks.js
index 3997ac4c..b1a9a3f0 100644
--- a/ui (gen4)/features/virtual-blocks.js	
+++ b/ui (gen4)/features/virtual-blocks.js	
@@ -71,7 +71,7 @@ var VirtualBlocksActions = actions.Actions({
 					...
 				}
 			`,
-		function(ref, offset, data){
+		function(ref, offset, img){
 			ref = ref || 'current'
 			offset = offset || 'after'	
 			offset = offset == 'after' ? 
@@ -82,7 +82,7 @@ var VirtualBlocksActions = actions.Actions({
 					offset
 				: 0
 			// XXX revise...
-			data = arguments[arguments.length-1] instanceof Object ?
+			img = arguments[arguments.length-1] instanceof Object ?
 				arguments[arguments.length-1]
 				: null
 
@@ -103,8 +103,8 @@ var VirtualBlocksActions = actions.Actions({
 			data.updateImagePositions()
 
 			// update data...
-			data
-				&& (this.images[gid] = data)
+			img
+				&& (this.images[gid] = img)
 			this.markChanged
 				&& this
 					.markChanged('data')