mootools/mootools-core — Issue #2284: Element.style setOpacity is broken in <IE8
Author: RiZKiT
Created: 2012-02-09 11:21:07+00:00
State: open

From Core 1.4.3 to 1.4.4 setOpacity (https://github.com/mootools/mootools-core/blob/master/Source/Element/Element.Style.js#L45-53) got broken for IE7/8 in some conditions, the result is an invalid style like:

`filter: alpha(opacity=NaN)alpha(opacity=90)`

Try the following fiddle in IE8 with MooTools 1.4.3 and 1.4.4 (edge):
http://jsfiddle.net/2vG5p/5/