[Dovecot] Assertion failed in dovecot 0.99.14

[Quadriplegic Leprechaun]

Hi,

I am using the dovecot imap server on Linux 2.6.8.1.

I get the following error when running it:
imap(quad): Panic: file index-sync.c: line 25 (index_storage_sync_size): 
assertion failed: (messages > ibox->synced_messages_count)

This usually occurs when I use imapfilter to move messages from one 
folder to another, while my client (thunderbird) is connected.

Quad