Sorry...should have been more specific. I tested with:
Liferay 4.3.3 in Tomcat 5.5
ICEfaces was built from the head of the repository (what will eventually become 1.7 DR3).
I tested with the Noir theme and that's where I saw the z-order issue that I mentioned. I opened a separate JIRA for that (ICE-2435). When I tested with the classic theme, I didn't see any issues.
If you're still seeing this behaviour, can you:
check with the latest from the repository and/or
attach a simplified test .war that I can look at
I can't replicate exactly the issue in this case. My test case shows multiple modal and draggables working with both IE7 and Firefox (and Safari 3). There is a z-order issue that I see but it appears to be related to something else so I will file a separate JIRA for it.
Resolving as fixed.