Thanks - problem is solved. In another newsgroup I got an answer with the
following link:
http://support.microsoft.com/default...duct=xl10kbGer
"J. S. EDV" wrote:
> Hello,
>
> one of my customers has changed the windows xp designs to its own. From this
> moment excel doesn't show the font color and the background color of a cell
> in the worksheet. Only in the print preview you can see the color settings of
> the cells.
>
> I'm not shure if this problem belongs to the changing of the windows xp
> designs, but from this moment it did occur.
>
> This occurs on new excel-documents and on existing ones. With another user
> account on the same machine the problem doesn't occur.
>
> I have reinstalled Office 2003 and even deleted user registry entries for
> Office11, but this doesn't help.
>
> I think I could solve this problem by recreating the user account, but I
> would like to solve it without this.
>
> Does anyone has any ideas?
>
> Thanks
>
> Jacek Schikora