[CentOS] firefox 1.5.0.5 packages

I installed the new firefox 1.5.0.5 packages and had a few issues.  I had 
read a similar post on the nahant list.  I would doubt that this is a 
centos-induced problem.  The browser crashed when opening the extensions 
manager and also with a very simple webmail page.  I have reverted to the 
firefox 1.0.8 packages and these problems have disappeared.