[Bug 1056726] [NEW] Thunderdird use 104% Cpu and hang after delete of hundred of message on imap

[Francesco Usseglio]

Public bug reported:

I jave a mailbox on a IMAP server (dovecot). I receive a lot of mail in this account. When I try to delete them (e.g. 300 messages) thunderbird becomes very slow and after a while it stops responding and i have to close thunderbird and launch again. 
with "top" I can see thunderbird uses 104% of cpus (i have a quad core)

This starts happening upgrading from thuderbird 14 to 15

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: thunderbird 15.0+build1-0ubuntu0.12.04.1
ProcVersionSignature: Ubuntu 3.2.0-31.50-generic 3.2.28
Uname: Linux 3.2.0-31-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
BuildID: 20120827103657
CheckboxSubmission: 0a1ed1081fa3146f6d225849071ab97c
CheckboxSystem: 6ce041aeed0a2c17b3343b66d157175d
Date: Wed Sep 26 11:26:17 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
Profiles: Profile0 (Default) - LastVersion=Safe Mode/Safe Mode (Out of date)
SourcePackage: thunderbird
UpgradeStatus: Upgraded to precise on 2012-04-16 (162 days ago)

** Affects: thunderbird (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/1056726

Title:
  Thunderdird use 104% Cpu and hang after delete of hundred of message
  on imap

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