User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9) Gecko/2008051206 Firefox/3.0 Build Identifier: Thunderbird/2.0.0.15 - Lightning 0.0.8 Few minutes after start of TB and giving master-password, TB eats all available memory (in my case more than 800mb). WinXP slows down and hangsup. The problem occurs also if Thunderbird is only in idle mode - no function is called. Same happened with 2.0.0.14- upgrade to.2.0.0.15 didn't fix it I used Tb 2.0.0.14 with Lightning 0.0.8 - since several month w/o any problems the problem occured just ~ 5days ago. Starting "thunderbird.exe -safe-mode" makes no difference! Reproducible: Always Steps to Reproduce: 1.Start Tb 2.Enter Master passwort 3. wait 5min 4. memory consumption grows 55mb, 60, 90, 150, 280, 500, 750mb until XP slowsdown within 1min... Actual Results: PC hang Alt-ctrl-del task manager cancel Thunderbird Expected Results: XP awakes back

Same behavior here with 2.0.0.14 on windows. Have not tried any other version yet.

TB 2.x is in security maintenance mode. So even if the problem can be confirmed and located in the code, this is not going to get resolved for 2.x. _Unless_ it was a regression since an ealier version of TB 2.0.0.x. Therefore clearing dependency on Gecko 1.8 bug (not sure why it was connected at all to that bug in the first place). Please try to confirm with Shredder alpha 1 (which is the first alpha on the way to (Thunderbird 3) or one of the Thunderbird 3.0a2 nightlies.

(In reply to comment #2) > TB 2.x is in security maintenance mode. So even if the problem can be confirmed > and located in the code, this is not going to get resolved for 2.x. That's not quite true. TB 2.x is in security and stability mode. If a fix was found that is simple enough then we might take it. However in this instance I wouldn't expect that's the case.

Just installed TB 3.0a2 - and the memory consumption seems to be stable at 42.000k But no add ons are installed - no Lightning ( Will observe the next days

feder, and if you go back to 2.0.0.x - problem is still there?

No response, so resolving as worksforme.