Could it be the IE6 peek-a-boo bug?
Try including this script: Dean Edwards' IE8.js script. It fixes the peek-a-boo bug and several others, and makes IE6 (and IE7) behave much more like an up-to-date browser. Have a look at the list of things it fixes/implements.
You need to include ie7-squish.js
to fix the IE6 bugs, by the way.
Blixt
2009-07-24 06:57:31