https://bugs.winehq.org/show_bug.cgi?id=28886
--- Comment #4 from Ruslan Kabatsayev b7.10110111@gmail.com --- Yes, this is still present in wine-1.7.31-99-g5ecea72. I don't think that terminal output is really relevant here because it's a matter of whether this thing has been implemented. But here's what winecfg outputs, being started with "Allow the window manager to decorate the windows" unchecked and Royale style selected:
fixme:msg:pack_message msg 14 (WM_ERASEBKGND) not supported yet
And its window decorations are still following "classic" style.