Further to discussing with wiz2003 on telephone, I can offer the following problem areas, Vista (who cares) will bsod, XP SP3 will bsod
XP SP2 does not bsod but does take up enormous amounts of CPU time, Win7 (vista with a new jacket) Bsod.
Also interprets a third party program phoning home for update checks as bad behaviour (no its not, i wrote it).
A program written to facilitate joining game servers checks the website for mod and program updates and downloads accordingly, but this is seen as bad behaviour. So its a no no until its fixed.
Having said all this Top marks ALWIL.