Setting to 5.1.z?
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2008-0148.html
*** Bug 432573 has been marked as a duplicate of this bug. ***
I request a re-opening of this ticket for the following reasons... 1. This issue is not closed because the newly released version of thunderbird, 1.5.0.12-9.el5_1, does NOT fix the problem. I can still crash thunderbird by openening multiple Compose windows and then closing them. 2. As auerbach pointed out, this problem exists on rhel4 as well.
confirming what K.Scott Rowe notes: 1.5.0.12-9.el5_1 still crashes as described. RH4 version: thunderbird-1.5.0.12-8.el4 crashes under same circumstances. We are downgrading users to thunderbird-1.5.0.12-7.el4 to work around this issue. Please fix.
Then I suggest that is a different crash and deserving of a different bug. RHEL4 was not affected by the linker error that we corrected with this bug and advisory.
Bug 432573 noted this issue from the get-go occurring also on RH4 yet you marked it as a duplicate (Comment #9). https://bugzilla.redhat.com/show_bug.cgi?id=432573 so, maybe just reopen that one...