diff --git a/editor/spinbtn/JQuerySpinBtn.js b/editor/spinbtn/JQuerySpinBtn.js
index 0d337960..4a7034b7 100644
--- a/editor/spinbtn/JQuerySpinBtn.js
+++ b/editor/spinbtn/JQuerySpinBtn.js
@@ -33,6 +33,7 @@
  * v1.3a 28 Sep 2006 - George Adamson	- Minor enhancements
  * v1.4  18 Jun 2009 - Jeff Schiller    - Added callback function
  * v1.5  06 Jul 2009 - Jeff Schiller    - Fixes for Opera.  
+ * v1.6  13 Oct 2009 - Alexis Deveria   - Added stepfunc function  
  *                                        Fast-repeat for keys and live updating as you type.
  
  Sample usage:
@@ -68,6 +69,7 @@ $.fn.SpinButton = function(cfg){
 			min: cfg && !isNaN(parseFloat(cfg.min)) ? Number(cfg.min) : null,	// Fixes bug with min:0
 			max: cfg && !isNaN(parseFloat(cfg.max)) ? Number(cfg.max) : null,
 			step: cfg && cfg.step ? Number(cfg.step) : 1,
+			stepfunc: cfg && cfg.stepfunc ? cfg.stepfunc : false,
 			page: cfg && cfg.page ? Number(cfg.page) : 10,
 			upClass: cfg && cfg.upClass ? cfg.upClass : 'up',
 			downClass: cfg && cfg.downClass ? cfg.downClass : 'down',
@@ -82,8 +84,16 @@ $.fn.SpinButton = function(cfg){
 			callback: cfg && cfg.callback ? cfg.callback : null,
 		};
 		
+		
 		this.adjustValue = function(i){
-			var v = (isNaN(this.value) ? this.spinCfg.reset : Number(this.value)) + Number(i);
+			var v;
+			if(isNaN(this.value)) {
+				v = this.spinCfg.reset;
+			} else if($.isFunction(this.spinCfg.stepfunc)) {
+				v = this.spinCfg.stepfunc(this, i);
+			} else {
+				v = Number(this.value) + Number(i);
+			}
 			if (this.spinCfg.min !== null) v = Math.max(v, this.spinCfg.min);
 			if (this.spinCfg.max !== null) v = Math.min(v, this.spinCfg.max);
 			this.value = v;
diff --git a/editor/svg-editor.js b/editor/svg-editor.js
index b8a7b25f..2aae6574 100644
--- a/editor/svg-editor.js
+++ b/editor/svg-editor.js
@@ -88,8 +88,8 @@ function svg_edit_setup() {
 	var zoomChanged = function(window, bbox) {
 		var scrbar = 15;
 		var res = svgCanvas.getResolution();
-		
 		var w_area = $('#workarea');
+		var canvas_pos = $('#svgcanvas').position();
 		w_area.css('cursor','auto');
 		var z_info = svgCanvas.setBBoxZoom(bbox, w_area.width()-scrbar, w_area.height()-scrbar);
 		if(!z_info) return;
@@ -99,10 +99,10 @@ function svg_edit_setup() {
 		setResolution(res.w * zoomlevel, res.h * zoomlevel);
 		var scrLeft = bb.x * zoomlevel;
 		var scrOffX = w_area.width()/2 - (bb.width * zoomlevel)/2;
-		w_area[0].scrollLeft = Math.max(0,scrLeft - scrOffX);
+		w_area[0].scrollLeft = Math.max(0,scrLeft - scrOffX) + Math.max(0,canvas_pos.left);
 		var scrTop = bb.y * zoomlevel;
 		var scrOffY = w_area.height()/2 - (bb.height * zoomlevel)/2;
-		w_area[0].scrollTop = Math.max(0,scrTop - scrOffY);
+		w_area[0].scrollTop = Math.max(0,scrTop - scrOffY) + Math.max(0,canvas_pos.top);
 		clickSelect();
 	}
 
@@ -1349,6 +1349,21 @@ function svg_edit_setup() {
 	
 	$(window).resize( centerCanvasIfNeeded );
 	
+	function stepZoom(elem, step) {
+		var orig_val = elem.value-0;
+		var sug_val = orig_val + step;
+		
+		if(orig_val >= 100) {
+			return sug_val;
+		} else {
+			if(sug_val >= orig_val) {
+				return orig_val * 2;
+			} else {
+				return orig_val / 2;
+			}
+		}
+	}
+	
 	function setResolution(w, h, center) {
 		w-=0; h-=0;
 		$('#svgcanvas').css( { 'width': w, 'height': h } );
@@ -1357,8 +1372,13 @@ function svg_edit_setup() {
 
 		centerCanvasIfNeeded();
 		
+		var res = svgCanvas.getResolution();
+		
 		if(center) {
 			var w_area = $('#workarea');
+// 			console.log(w_area[0].scrollLeft); //  1677
+// 			console.log('w',w_area.width()); // 875 // zoom: 4.67
+			// Want: 1942 (+265)
 			var scroll_y = h/2 - w_area.height()/2;
 			var scroll_x = w/2 - w_area.width()/2;
 			w_area[0].scrollTop = scroll_y;
@@ -1389,7 +1409,7 @@ function svg_edit_setup() {
 	$('#rect_rx').SpinButton({ min: 0, max: 1000, step: 1, callback: changeRectRadius });
 	$('#stroke_width').SpinButton({ min: 0, max: 99, step: 1, callback: changeStrokeWidth });
 	$('#angle').SpinButton({ min: -180, max: 180, step: 5, callback: changeRotationAngle });
-	$('#zoom').SpinButton({ min: 10, max: 10000, step: 50, callback: changeZoom });
+	$('#zoom').SpinButton({ min: 0.1, max: 10000, step: 50, stepfunc: stepZoom, callback: changeZoom });
 	
 	svgCanvas.setCustomHandlers = function(opts) {
 		if(opts.open) {