I've emailed support about this, but have received no reply from them. Guess I should try here too, even though the question/answer ratio is depressingly high.
I am not able to synchronize between PocoMail and PocoMailPE.  In attempting to synchronize, I am encountering the following problems:
1) After running synchronize when there is one new message in PE that does not exist in PM, a message with the Subject and From appears in PM, but the message body is empty and the Sent time is blank.
2) When I then compress the mailbox in PE, the mailbox now has a duplicate for each original message.
3) I have also seen duplicates appear in PM following synchronization attempts