I noticed some differences.
If you move over a selected tab Office 10 does not change the color or outlook. Fivewin does.
Not changing the color gives a more stable impression.


TRibbonBar
METHOD MouseHover( nRow, nCol ) CLASS TRibbonBar
  local nPrompt := ::nOverPrompt( nRow, nCol )
  if ::nLastOver != 0 .and. ::nLastOver != ::nOption .and. ::nLastOver != nPrompt
   ::PaintOver( ::nLastOver, 4 )
  endif
  if nPrompt == 0
   ::PaintOver( ::nOption,1 )
   ::nLastOver := 0
//Â Â elseif nPrompt == ::nOption
// Â Â ::PaintOver( ::nOption, 2 )
// Â Â ::nLastOver := ::nOption
 else
   ::PaintOver( nPrompt, 3 )
   ::nLastOver := nPrompt
  endif
return nilIt seems to me that
Office 2010 uses a smaller value than 6 to round.
::hRgn := CreateRoundRectRgn( aRect, 6, 6 )


Best regards,
Otto