[jQuery] Animation bug in 1.2

[jQuery] Animation bug in 1.2

Url in question: <a href="http://benjaminsterling.com/experiments/jqGalViewV2/"> http://benjaminsterling.com/experiments/jqGalViewV2/</a>
At about line 87 and then again at line 91 I have the following:
$holder.animate({marginTop:-($mainImgContainer.height()*index)},'1000',
opts.tnease);
Depending on the link at bottom clicked, the marginTop gets set to what ever $mainImgContainer.height()*index adds up to, but with a minus infront.  So if you click on eight you get -2492.  And when you clicked 7, you would get -2136.  In
1.1.3 this worked fine[1].  But with 1.2 it will just add up the marginTop, so -2492 and -2136 becomes -4628.
In an earlier post, John[2] suggested that the animation method only took in integers, so if I do:
$holder.animate({marginTop:parseInt(-($mainImgContainer.height()*index))},'1000', opts.tnease);
It should work, but sadly, still adds up.  Is this a true bug, or am I missing something?
[1] <a href="http://benjaminsterling.com/experiments/jqGalView">
http://benjaminsterling.com/experiments/jqGalView</a>
[2] <a href="http://groups.google.com/group/jquery-en/browse_thread/thread/705cd47864c22c49/485702b3f03547c5#485702b3f03547c5">http://groups.google.com/group/jquery-en/browse_thread/thread/705cd47864c22c49/485702b3f03547c5#485702b3f03547c5
</a>
--
Benjamin Sterling
<a href="http://www.KenzoMedia.com">http://www.KenzoMedia.com</a>
<a href="http://www.KenzoHosting.com">http://www.KenzoHosting.com</a>