innerWidth() returns 0 in firefox with visibility: hidden

innerWidth() returns 0 in firefox with visibility: hidden

I noticed in upgrading to 1.2.6 that in Firefox (2) that innerWidth returns 0 when the parent is set to visibility: hidden. This changed from 1.2.3+dimensions. Two test pages are provided:
<a href="http://jdsharp.us/jQuery/debug/scrollbar-1.2.6.html">http://jdsharp.us/jQuery/debug/scrollbar-1.2.6.html</a>
<a href="http://jdsharp.us/jQuery/debug/scrollbar-1.2.3-dimensions.html">http://jdsharp.us/jQuery/debug/scrollbar-1.2.3-dimensions.html</a>
The following ticket is open:
<a href="http://dev.jquery.com/ticket/3011">http://dev.jquery.com/ticket/3011</a>
Cheers,
-Jonathan