Hi,
All fixed now, it turns out the version of media companion i had updated to changed the set
none
to
-none-
which xbmc actually reads as a set named none, instead of no set if that makes sense
anyhow, i changed to an older version of mc, selected my entire movie collection 1847 films, and re-set them to the set
none
now its all working fine,
just thought i would post in case anyone else hits the same problem