http://bugs.winehq.org/show_bug.cgi?id=13591
--- Comment #10 from Vladimir vladimiroski@gmail.com 2008-12-07 01:20:45 --- ePlus devs released a workaround to this issue (in July 08), so I've to downgrade my ePlus to check this bug.
However, oMule (original eMule) still does not has a fix for this and (with wine-1.1.9-183-gbbaa72d) its notifications popups looks like the picture in the above attachment, so I guess this bug is still present in wine.