THANK YOU!!!
Bless you Laffs, I have been fighting with this for days. Could not get the fonts in the group window to work with any in the remaining windows.
Will check it out.
Had about 10 minutes to play around with it, and found that the mouse over does not give a description of the underlying button. IE spell name, inventory item, item in bag, etc. Also got the UI incompatible message, but did not have time to narrow it down which part it was.
Will check more later this evening.