End user was spellchecking a lot. The following reg key references to your personal word list.
HKEY_CURRENT_USER\Software\Novell\User Word List\6.1\UK\User Word List 0 = C:\Documents and Settings\user profile\Local Settings\Application Data\WT61UK.UWL
In the users case it was 0bytes. Mine was 9K. I swapped them over and hey presto it works (what happens if there is no file?).
It does mean that this file is specific to the PC and does not follow the user around, it would be nice to have this built into the users mailbox a bit like the addressbook, it means if they desk hop it will follow them around?
I have created a shortcut to C:\Documents and Settings\user profile\Local Settings\Application Data for the end user so they can back up the file periodically.