It's certainly not for lack of trying Your suggestions have been greatly apprieciated - it's currently 7.20 am after an all night stint - good company :)
Not resolved yet but I thought I'd keep posting findings incase it helps any one.
Given the order of my pgae flow is:
- Logo
- Logon/home
- Catagory tabs
- All the rest
I've found that sizing starts to go wrong from the catagory bar. all above seems to use 100%



