I've even seen wineserver crashes from this: ../../src/xcb_io.c:378: _XAllocID: Assertion `ret != inval_id' failed. wine: Assertion failed at address 0x70997832 (thread 0060), starting debugger... X Error of failed request: BadIDChoice (invalid resource ID chosen for this connection) Major opcode of failed request: 55 (X_CreateGC) Resource id in failed request: 0x4801c8a Serial number of failed request: 27638 Current serial number in output stream: 27639 Can't attach process 0008: error 5 wineserver crashed, please enable coredumps (ulimit -c unlimited) and restart.