Combo boxes make the toolbar be heigher with Office2003 skin & RTL mode on IE

[Saare]

when adding combobox to the toolbar, the line is getting heighr and the background is being duplicated. it happens with the Office 2003 skin with RTL mode and IE6 & 8, couldn't check on 7.
to reproduce:
generate an editor with a toolbar containes, for example, FontSize or TextColor. also make sure you are using Office2003 skin and RTL mode. then, look at the toolbar and notice that the row is bigger and there is a start of a new background just underneath.
*attached an image to explain.

[Saare]

notice the area marked in red

[Senthil]

This issue is happening to us also when we have the '-' between the dropdown toolbar controls. Please see the example below.

Ex: CKEDITOR.config.toolbar = [

['Templates','-','Styles','Format','Font','FontSize']

]

[garry.yao]

The issue is even reproduced without the RTL config.

Manual TCs added at :  http://ckeditor.t/tt/4461/1.html

[garry.yao]

Fixed with [4570].