Duncan - as this is a new server, you might like to ask your hosting company, why you are on a standard copy of PSA and not an RPM version. Plesk are dropping the standard version, and moving over entirely to RPM's. Also as your paths are different, it will give you headaches with regards to upgrades & patches.
Plesk 6 will be out soon, so you might have problems upgrading - worth enquiring now, about having the RPM version of 5.0.5.
at the moment - but expanding all the time....) 
