https://bugs.winehq.org/show_bug.cgi?id=56237
--- Comment #2 from Rafał Mużyło galtgendo@o2.pl --- If you're talking about odd dialog behavior (not related to modality, as that has (well, *had* - haven't checked in awhile and no longer recall the places where I've seen it) quite a few quirky corner cases due to Windows/Linux different take on the concept), would you mind looking at bug 54233 ?
There's a simple hierarchy of *centered* dialog->static->dialog that somehow pushes the internal dialog partially outside the bounds of the outer dialog.