Hi,
I don't see this using FF 3.0.5 in a simple test with 6.5 and woodstock
4.2 version however I don't know exactly what you have in your project.
I'm not sure if upgrading your woodstock version will solve issue as
was similarly posted in this thread on old Creator forum:
http://forums.sun.com/thread.jspa?forumID=427&threadID=5344303.
Another alternative would be to migrate to ICEfaces
http://www.netbeans.org/community/news/newsletter/2008-12-22.html
/krys