We have 5 staff post offices and all started receiving the same error, in their poa logs, on 16 June 2010. We are using GW8.0.1 on a Linux platform.

Error: Invalid WordPerfect character -- not a valid charset or character [C01B]

The senders are all IMAP users. Random mails generate the above error. Some are on linux and others use apple mac. The e-mail has nothing out of the ordinary that I can see.

Any ideas?