[CentOS] Firefox freezes for a few seconds, since update to v.1.5.0.12

Thu Jul 26 18:49:31 UTC 2007
Lanny Marcus <mailing-lists at computer2.com>

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.12) Gecko/20070719
CentOS/1.5.0.12-0.3.el4.centos Firefox/1.5.0.12

I updated Firefox a few days ago. Now, very frequently, it freezes, for
a few seconds, each time. Is this a known bug? Does it have a simple
cure?   TIA, Lanny