diff --git a/buildcache.py b/buildcache.py
index 8172e388..be0ff3ae 100755
--- a/buildcache.py
+++ b/buildcache.py
@@ -1,7 +1,7 @@
 #=======================================================================
 
 __version__ = '''0.0.01'''
-__sub_version__ = '''20130613200255'''
+__sub_version__ = '''20130622165505'''
 __copyright__ = '''(c) Alex A. Naanou 2011'''
 
 
@@ -329,7 +329,11 @@ def build_previews(image, path=None, config=CONFIG, dry_run=True, verbosity=0):
 	image['preview'][str(max(*img.size)) + 'px'] = img_path
 
 	# previews...
-	for k, spec in sizes.items():
+	preview = None
+	# NOTE: do the big previews first...
+	s = sizes.items()
+	s.sort(lambda a, b: cmp(b[1], a[1]))
+	for k, spec in s:
 
 		if k in image['preview'].keys():
 			continue
@@ -344,6 +348,11 @@ def build_previews(image, path=None, config=CONFIG, dry_run=True, verbosity=0):
 
 		# add image to index...
 		if not os.path.exists(p):
+			# use the preview to speed things up...
+			# NOTE: this will degrade the quality of previews after
+			# 		several resizes...
+##			if preview != None:
+##				img = preview
 			scale = spec/float(max(*img.size))
 			preview = img.resize((int(img.size[0]*scale), int(img.size[1]*scale)), Image.ANTIALIAS)
 
diff --git a/ui/keybindings.js b/ui/keybindings.js
index c9ccb48f..cd072ac1 100755
--- a/ui/keybindings.js
+++ b/ui/keybindings.js
@@ -274,7 +274,7 @@ var KEYBOARD_CONFIG = {
 		// XXX STUB: use a real path browser...
 		O: doc('Open a directory path',
 			function(){
-				loadDirectory()
+				loadDirectoryDialog()
 			}),
 
 
@@ -451,6 +451,10 @@ var KEYBOARD_CONFIG = {
 		S: {
 				default: doc('Start slideshow', 
 					function(){ toggleSlideShowMode('on') }),
+				shift: doc('Sort images',
+					function(){
+						sortImagesDialog()
+					}),
 				ctrl: doc('Save current state', 
 					function(){
 						event.preventDefault()
@@ -477,7 +481,7 @@ var KEYBOARD_CONFIG = {
 					}),
 				'ctrl+shift': doc('Export',
 					function(){
-						exportPreviews()
+						exportPreviewsDialog()
 					}), 
 			},
 		Z: {
diff --git a/ui/ui.js b/ui/ui.js
index 2f59d879..5607e49d 100755
--- a/ui/ui.js
+++ b/ui/ui.js
@@ -490,6 +490,43 @@ var FIELD_TYPES = {
 			return field.find('.path').val()
 		},
 	},
+
+	choice: {
+		type: 'choice',
+		text: null,
+		default: false,
+		html: '<div class="field choice">'+
+				'<span class="text"></span>'+
+				'<div class="item">'+
+					'<input type="radio" class="value"/>'+
+					'<span class="item-text"></span>'+
+				'</div>'+
+			'</div>',
+		// format: ['a', 'b', 'c', ...]
+		test: function(val){
+			return typeof(val) == typeof([]) && val.constructor.name == 'Array'
+		},
+		set: function(field, value){
+			var t = field.find('.text').text()
+			var item = field.find('.item').last()
+			for(var i=0; i < value.length; i++){
+				item.find('.value')
+					.val(value[i])
+				item.find('.item-text')
+					.text(value[i])
+				item.appendTo(field)
+
+				item = item.clone()
+			}
+			field.find('.value')
+				.attr('name', t)
+				.first()
+					.attr('checked', '')
+		},
+		get: function(field){ 
+			return $(field).find('.value:checked').val()
+		},
+	},
 }
 
 // Show a complex form dialog
@@ -642,8 +679,11 @@ function getDir(message, dfl, btn){
 }
 
 
+
+/***************************************** Domain-specific dialogs ***/
+
 // XXX do reporting...
-function exportPreviews(dfl){
+function exportPreviewsDialog(dfl){
 	dfl = dfl == null ? BASE_URL : dfl
 	var res = $.Deferred()
 
@@ -653,7 +693,7 @@ function exportPreviews(dfl){
 		'Image name pattern': '%f',
 		'Fav directory name': 'fav',
 		'Destination': {ndir: dfl},
-	}, 'OK', 'exportPreviews')
+	}, 'OK', 'exportPreviewsDialog')
 		.done(function(data){
 			exportTo(
 				data['Destination'], 
@@ -675,7 +715,7 @@ function exportPreviews(dfl){
 }
 
 
-function loadDirectory(dfl){
+function loadDirectoryDialog(dfl){
 	dfl = dfl == null ? BASE_URL : dfl
 	// browser version...
 	var getter = window.listDir != null ? getDir : prompt
@@ -697,8 +737,45 @@ function loadDirectory(dfl){
 }
 
 
+function sortImagesDialog(message){
+	updateStatus('Sort...').show()
+
+	message = message == null ? 'Sort images by:' : message
+	cfg = {}
+	cfg[message] = [
+		'Date (ascending)', 
+		'Name (ascending)', 
+		'Date (decending)', 
+		'Name (decending)', 
+	]
+
+	formDialog(null, '', 
+			cfg,
+			'OK', 
+			'sortImagesDialog')
+		.done(function(res){
+			res = res[message]
+
+			if(/Date/.test(res)){
+				var method = sortImagesByDate
+			} else {
+				var method = sortImagesByName
+			}
+			if(/\(ascending\)/.test(res)){
+				var reverse = null
+			} else {
+				var reverse = true
+			}
+
+			showStatusQ('Sorting by: '+res+'...')
+
+			method(reverse)
+		})
+		.fail(function(){
+			showStatusQ('Sort: canceled.')
+		})
+}
 
-/************************************************ Specific dialogs ***/
 
 function showImageInfo(){
 	var gid = getImageGID(getImage())