Hi
I have fixed these now (sort of). I had two problems....
1. We have the below in the main stylesheet for html and body tags which was affecting the height of the drop downs.
font: normal 90%/1.8em Arial, sans-serif, sans;
2. By setting an actual width on the drop downs seems to fix the width padding issue.
The only problem with altering number 1 is that it affects every page on the site, do you have a simple fix that will save us having to do this? In version 5.3 the combos rendered fine height wise.....