Ive started getting the same error that a few others have mentioned recently in 5.4.3. I havnt changed anything, and I think its only started since upgrading to 5.4.3. I ran 5.4.0-rc2 for a long while prior to upgrading and don't think I saw the error once then.
vmysql: sql error: Can't create database 'vpopmail'. Database exists vmysql: sql error: No Database Selected Sorry, no mailbox here by that name. vpopmail (#5.1.1) cheers Shane