Yep, downloaded the Asiliant W2k Drivers for the 65555 (although it also refers to 69030), release 2.5.1c and installed them.
Is it something to do with LCD vs CRT? The new drivers all have refresh rates which I thought was irrelevant for an LCD screen. Also, I've lost the Toshiba hardware setup(HWSETUP) control panel extension. The usual helpful Microsoft error - "an error occurred while Windows was working with the Control Panel file C:\WINDOWS\system32\HWSETUP.CPL". This is inspite of downloading the latest version of this file. :-/