Fixed tooltip position for firefox

static/js/jquery.tipsy.js

@@ -37,6 +37,12 @@
                     width: this.$element[0].offsetWidth,
                     height: this.$element[0].offsetHeight
                 });
+
+				// XXX: sometimes pos.height is zero. I do not know why and I dont care.
+				if(isNaN(pos.height))
+					pos.height = 0;
+				if(isNaN(pos.width))
+					pos.width = 0;
                 
                 var actualWidth = $tip[0].offsetWidth,
                     actualHeight = $tip[0].offsetHeight,
@@ -51,7 +57,7 @@
                         tp = {top: pos.top - actualHeight - this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
                         break;
                     case 'e':
-                        tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth - this.options.offset};
+                        //tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth - this.options.offset};
 						// XXX HACK: i want to set another offset so apparently I have to hardcode this into the code. obviously.
                         tp = {top: pos.top + pos.height / 2 - actualHeight / 2 + this.options.offset, left: pos.left - actualWidth};
                         break;