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Severity:

HIGH – kills Thunderbird

Setup:

• Toshiba Portégé R600-101 laptop
• Windows XP SP3, all patches loaded
• Thunderbird 4.1.3 (Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.9) Gecko/20100915 Lightning/1.0b2 Thunderbird/3.1.4)
• FiltaQuilla 1.1.0
• 3GB RAM, >200GB free disk space, commit charge 2180/4759MB. 

Having enabled all relevant new filter types, and restarted T-bird, I create a message filter for an IMAP mailbox (STARTTLS) as follows:

• Apply filter when: Checking Mail or Manually Run
• Match any of the following:
  • From CONTAINS[email address]@yahoo.co.uk
• Perform these actions:
  • Detach Attachments To: C:Documents and SettingsJon GreenMy DocumentsMy DropboxParish CouncilAttachments

Having created the filter, I move it to the top of the priority list, select it and click "Run Now".  There are many matching messages, with attachments typically 20k-250k in size.  Shortly after the job starts, Thunderbird quits abruptly with no prior warning.  Some messages have had attachments detached; most have not.

It may be relevant that Thunderbird has a saved search rule over the inbox in question.

This is 100% repeatable, and applies to more than one mailbox.

Sometimes it bombs so completely that the Mozilla crash reporter doesn't trigger.  About 50% of the time it does.  The details are as follows:

It still occurs if I send attachments to a normal folder (rather than one controlled by Dropbox).

Any ideas?

Jon