Hi,

I ran into this issue while using the column-count css property with jQuery 1.8.3's css function. The call

$('div').css('-webkit-column-count', 2);

..would silently fail. After looking at the jQuery source, it looks like jQuery automatically appends 'px' to any number passed to the css function -unless- it is on a white-list of values (opacity, zoom, ..). As a workaround, I was able to change the call to...

$('div').css('-webkit-column-count', '2') , which succeeded. However this property might be a good candidate for the 'white list' to save others trouble in the future.

jsfiddle showing issue: http://jsfiddle.net/DfhMW/