Given: a CSS definition of this sort:

 div {clip:rect(0px 30px 30px 0px); /* (values set arbitrarily) */ } 

Using IE 8, if I attempt the following:

 $(document).ready(function () { alert( $("div").css("clip") ) }); 

The alert reports "undefined" unless the clip is defined in an inline style, i.e. <div style="clip:rect(...);"></div>. When the style is inline, it returns space-separated values, e.g. "rect(0px 30px 30px 0px)," even if the clip is defined with comma-separated values.

In FireFox 3.6.12 Mac, the alert reports "auto" if the clip is defined inline, but returns a string with comma-separated values (even if the definition uses space-separated values) if the clip is defined in a <style> tag.

WebKit browsers (tested on Safari 5.0.2 and Chome 7.0) return space-separated values of clip no matter if it is defined inline or in a style tag, and no matter if the definition contains commas or not.

Should I enter this as a bug?