F7/Thunderbird 2 Problem

[Norm <maillist@xxxxxxx>]

A new install of Fedora 7 went well using the rescue disk to start the 
process.
I added Thunderbird as my email client after the basic install, the 
first thing I noticed is Thunderbird 2 does not allow for RSS feeds - 
this seems to be a Mozilla issue  but another issue with Thunderbird has 
occurred.  For a while it works fine and then when I attempt to open an 
email it shuts down, usually but not always a reboot resets Thunderbird 
so that it works for a while and then the problem starts over again.
Has anyone else experienced this?  I am not sure if this is a 
Thunderbird issue or a Fedora issue so I have not submitted a bug report.