[Evolution] Moving/Copying between IMAP Folders Error

[Fintec <mailing_list fintec co nz>]

evolution.i386                           2.8.3-2.fc6
evolution-connector.i386                 2.8.3-1.fc6
evolution-data-server.i386               1.8.3-4.fc6
evolution-sharp.i386                     0.11.1-10.fc6
evolution-webcal.i386                    2.7.1-6

I have an IMAP account setup in evolution which appears to have stopped
allowing me to move/copy emails between folders. When I try copying or
moving nothing gets copied to the destination folder.

Running evolution from the command line I get the following error every
time I attempt an unscucessful move/copy:
(evolution:4416): camel-imap-provider-CRITICAL **: imap_command_start:
assertion `store->ostream!=NULL' failed

Is anyone else experiencing this or better yet know how to fix it?
Unless I want to keep everything in by inbox this makes evolution
useless.

Gavin