JRE SIGSEGV randonly crashing TBird, Vuze etc.

[JC]

Beginning approximately 10 days ago I started experiencing random crashes of Thunderbird, Vuze and Firefox. There does not have to be any user interaction for the app to crash, e.g. TBird is minimized to a panel and just suddenly disappears. I do not know how to reliably reproduce this but it is happening frequently. A typical crash log is attached but the basic info is:

# SIGSEGV (0xb) at pc=0x00007f577c126626, pid=2347, tid=140013617911552
#
# JRE version: 6.0_20-b20
# Java VM: OpenJDK 64-Bit Server VM (19.0-b09 mixed mode linux-amd64 compressed oops)
# Derivative: IcedTea6 1.9.10
# Distribution: Ubuntu 10.04.1 LTS, package 6b20-1.9.10-0ubuntu1~10.04.2
# Problematic frame:
# V [libjvm.so+0x54c626]

[JC (level3access)]

Further I have found that when TBird crashed it lost the inbox contents of two mail accounts. Now this is supposition because I didn't think to check this at the time of the crash but it occurred twice and based on the new mail in the iboxes it happened on the days that TBird crashed.

Since I can't use a mail client that is randomly wiping out inboxes I took the only simple workaround - uninstalled open jdk, icedtea etc. and installed the Sun jdk in its place. So far, so good.

[JC (level3access)]

I should clarify my last message. By "didn't think to check" I mean when TBird crashed I didn't go looking through all the folders to see if they were intact - I have too many mail accounts with too many folders to be doing that every time). However it appears that the two "emptyings" occurred at two different days and times and were at least close to the day and time of a TBird crash.

It has been close to 24 hours since I installed SUN JDK (6 not 7) and uninstalled the open JDK and so far none of the apps have crashed.

[JC (level3access)]

These 4 logs were all generated in one 5 minute interval by running Vuze. Vuze loads, populates its panes and then immediately disappears.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.