[Dovecot] Dovecot imap processes pinning CPU

[nuitari-dovecot at nuitari.net]

>>  Wow.  Yeah, *some*thing's changed recently to cause this.  If I had to
>>  guess, I'd say it's a recent Thunderbird upgrade that's triggering it, as
>>  it's been 2-3 weeks since my last dovecot upgrade.
>
> Some other interesting data points:
>
> * This problem seems to happen when I use Thunderbird (both on Linux and 
> Windows) as my MUA, but not with Squirrelmail.
>
> * The IMAP process seem to start going haywire when I shut Thunderbird down.

Thunderbird would use the inotify stuff, but I don't think squirrelmail 
does since it's web based.

On the installation where a pinned process is, the 2 people accessing that 
maildir are using Outlook. They both use Outlook.

One of them has the specific version:
Microsoft Office Outlook 2007 (12.0.6316.5000) SP1 MSO (12.0.6320.5000)

And I'm sure the other one will have some version of Outlook 2007, but I 
haven't been able to get in touch with them yet.