Hi, i think it would help if the wine-developers could try this app themselves,but apparently the app is not free. I found however swviewer (http://dl-ak.solidworks.com/secure/sw2008/sw2008_sp04.0_f/x86/080613.001-1/swviewer.exe?__gda__=1216183245_4f3c838c07a24bbacef12681df534119&ext=.exe) and i found this sample http://blogs.solidworks.com/teacher/files/left_leaf.SLDPRT, and did some testing. I can confirm the weird crash while resizing the window (X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 143 (GLX) Minor opcode of failed request: 5 (X_GLXMakeCurrent) ) Maybe you could try if your bugs are also present in this freely downloadable app, so wine-developers could try it themselves, and have better chance to solve the bugs. I didn't see actually other openGL apps crash like this, so somehow solidworks triggers wine in a special way to crash like this.