Hello Again all,
After trying the solution suggested by GregT I can say that this worked fine, for a time!
The problem for me has now returned! most strange.
I can confirm however that doing a <sudo shutdown -h now> from the command line will make my pc shutdown just fine?
Personally I'm not finding Hardy particularly buggy and I am very happy with it.
However I think that due to the number of "bugs" like this that have been reported maybe they shouldn't have classed Hardy as the current LTS version - I admit to allways waiting 6 months or so after the release of a new version, just to allow the worst of the problems to be sorted, however this is supposed to be the LTS version. In my mind this means that the bugs should only be "minor" and an issue with my laptop not shuting down correctly is rather anoying (as this drains the battery!).
anway my simple fix of doing the shutdown from the CLI is fine for me, but I wouldn't ask my mum to have to do this every time!