Hi Malcolm,
My BeoVision 10 was updated on Saturday, and I asked my dealer about the software versions.
The latest software for BeoVision 10 is build 224, so it appears that you still have the old (166) software, same as I did before the update. You should ask your dealer about this -- it seems your television's software has not been updated.
After the update to 224, the TV seems speedier (menus) and the sound is better, at least to my ears. I could swear there's a slight improvement in picture quality as well, but that may be a pseudo-effect, as I'm trying to spot improvements after the update. Some new items have also appeared to the Customer Service Menu.
Perhaps someone at BeoWorld has the full list of improvements with build 224?
As for Beo5, I think Keith Saunders, the Beo5 expert, has the best answer:
http://forum.beoworld.org/members/Keith_5F00_Saunders/default.aspx
You could also check the Beo5 forum at http://forum.beoworld.org/forums/48.aspx and do a search on the 1.45.