Flashing with JS slider

[besler3035]

http://projects.mindutopia.com/cambridgehouse/index.php

We're having problems with the right image, when you hover over it and then go off of it, it disappears for a second. Only happens in Firefox and IE 8/9.
Any ideas why this could be? We've tried tweaking the CSS multiple ways (which is why it doesn't look that great) to no avail.

There are the same problems in WebKit, but they're not nearly as noticeable. Please help!

 

[manueld]

Don't know if you've fixed the issue but I don't experience the issue which you mention in your post. I've tested it in FF 3.6.12 IE 8 and Chrome.