I think that these Wine 1.7.37 fixes by Mark Harmstone may improve GUI controls rendering:
Mark Harmstone (11):
comctl32: Fix clipping error with themed groupboxes.
comctl32: Always redraw background on checkbox repaint.
comctl32: Draw the focus rect on themed checkboxes.
comctl32: Draw focus rect on themed pushbuttons.
comctl32: Add themed scrollbar stub.
comctl32: Use theming when drawing IP address control.
comctl32: Redraw themed editboxes on focus change.
comctl32: Fix graphical error on themed progress bars.
comctl32: Do not call HEADER_FillItemFrame twice in a row.
comctl32: Themed buttons should not draw in System if font unset.