Index: ui/current/ui.slider.js
===================================================================
--- ui/current/ui.slider.js	(revision 3944)
+++ ui/current/ui.slider.js	(working copy)
@@ -102,19 +102,8 @@
 		$.data(el, "ui-slider", this);
 		o.stepping = parseInt(o.stepping) || (o.steps ? o.maxValue/o.steps : 0);
 		o.realValue = (o.maxValue - o.minValue);
-
-
+        
 		this.handle = options.handle ? $(options.handle, el) : $('.ui-slider-handle', el);
-		if(this.handle.length == 1) {
-			this.interaction = new $.ui.mouseInteraction(this.handle[0], options);
-			this.multipleHandles = false;
-		} else {
-			this.interactions = [];
-			this.handle.each(function() {
-				self.interactions.push(new $.ui.mouseInteraction(this, options));
-			});
-			this.multipleHandles = true;
-		}
 		
 		this.element = el;
 		$(this.element).addClass("ui-slider");
@@ -129,6 +118,23 @@
 			this.parentSize = $(this.element).outerHeight() - this.handle.outerHeight();
 			this.prop = 'top';
 		}
+
+		if(this.handle.length == 1) {
+			this.interaction = new $.ui.mouseInteraction(this.handle[0], options);
+			this.multipleHandles = false;
+		} else {
+			this.interactions = [];
+			var _this = this; // self is gone here...
+			this.handle.each(function() {
+			    var mi = new $.ui.mouseInteraction(this, options);
+			    // set initial curValue
+			    var pos = parseInt(this.offsetLeft);
+			    mi.curValue = Math.round((pos/_this.parentSize)*o.realValue);
+			    // add mouse interaction
+				self.interactions.push(mi);
+			});
+			this.multipleHandles = true;
+		}
 		
 		if(!this.multipleHandles) {
 			$(el).bind('click', function(e) { self.click.apply(self, [e]); });
@@ -157,11 +163,13 @@
 			for(var i=0;i<this.interactions.length;i++) {
 				if(self == this.interactions[i]) {
 					if(this.interactions[i-1]) {
-						if(this.interactions[i-1].curValue > this.interactions[i].curValue) return this.interactions[i-1].curValue;
+						if(this.interactions[i-1].curValue >= this.interactions[i].curValue)
+						    return this.interactions[i-1].curValue + (self.options.preventOverlap && self.options.stepping ? self.options.stepping : 0);
 					}
 					
 					if(this.interactions[i+1]) {
-						if(this.interactions[i+1].curValue < this.interactions[i].curValue) return this.interactions[i+1].curValue;
+						if(this.interactions[i+1].curValue <= this.interactions[i].curValue)
+						    return this.interactions[i+1].curValue - (self.options.preventOverlap && self.options.stepping ? self.options.stepping : 0);
 					}
 				}
 			}