dovecot - Mar 2011 - SiS: Attachment file larger than expected

I recently set up SiS and imported a large chunk of mail.

I've noticed one or two instances of this in the logs:

Mar 28 09:03:50 mail dovecot: imap(xxx at yyy.zz): Error: Attachment file
/mailstore/attachments/ce/73/ce737a45fe07495e2ae6466f9e381a30d5ec300406f11269d79bd5608cc0c922-822b3d2df67f8e4d7f5000009501e12a
larger than expected (252218)
Mar 28 14:52:34 mail dovecot: pop3(zzz at xxx.yy): Error: Attachment file
/mailstore/attachments/c5/e1/c5e13d671d1d796680ae7166363afcb819af3d9cd04e01de7d65031b2f732bdf-b2ecf918b910904d826200009501e12a
larger than expected (143959)

Could that be an indication of a hash collision? No problem reports from the
affected users.

Output of du -b below:

186572 
/mailstore/attachments/ce/73/ce737a45fe07495e2ae6466f9e381a30d5ec300406f11269d79bd5608cc0c922-822b3d2df67f8e4d7f5000009501e12a
106489 
/mailstore/attachments/c5/e1/c5e13d671d1d796680ae7166363afcb819af3d9cd04e01de7d65031b2f732bdf-b2ecf918b910904d826200009501e12a

Both attachments are PDF documents. I'm using Dovecot 2.0.11 + changesets
d3d6ed6d268b and 890a46b3ab63 from git.

-- 
Andrew Lewis <andrew at sybaweb.com>

On 28.3.2011, at 16.25, Andrew Lewis wrote:
> I recently set up SiS and imported a large chunk of mail.
With dsync?
> I've noticed one or two instances of this in the logs:
> 
> Mar 28 09:03:50 mail dovecot: imap(xxx at yyy.zz): Error: Attachment file
/mailstore/attachments/ce/73/ce737a45fe07495e2ae6466f9e381a30d5ec300406f11269d79bd5608cc0c922-822b3d2df67f8e4d7f5000009501e12a
larger than expected (252218)
Do you think it's possible for you to reproduce this? If you have the
original pre-dbox mail and you convert it to a new and empty dbox+sis and
reading it gives this error message, I'd really like to get the original
mail.
> Could that be an indication of a hash collision?
Highly unlikely. There have been other similar error reports, so I know
there's a bug somewhere. I just don't really know where. I haven't
managed to reproduce any SIS errors with any of my tests.