http://bugs.winehq.org/show_bug.cgi?id=35361
--- Comment #44 from noother wine@noother.net --- Since the Steam update from Jul, 2nd 2014 every game now crashes when hitting shift+tab to open the overlay (while patched with the imm32.patch - without it it's still crashing on keypress)
Maybe relevant entries from the changelog (http://store.steampowered.com/news/13768/): - Fixed in-game overlay sometimes not activating on first hot-key press after game launch - Fixed a bug in the in-game overlay which could lead to a game crash in ShellExecute calls with unexpected parameters - Changed in-game overlay to prefer first created and still in-use swapchain and avoid presenting on multiple swapchains at once
I attached 2 files that got produced by Antisquad (Unity game) that might be useful.