Well, I'm very inexperienced in regression testing too, and have a question: I filed a bugreport about a possible regression that prevents Alpha Prime from runnning correctly: http://bugs.winehq.org/show_bug.cgi?id=21941 I tried to revert the patch that might caused the problem in the game following this guide: http://wiki.winehq.org/RegressionTesting So I made the following in the wine-git directory: git bisect reset then git show 224043d6cf8b56e9ff2537358646700211d54d1f | patch -p1 -R but the result was this: patching file dlls/wined3d/buffer.c Hunk #3 FAILED at 1058. Hunk #4 succeeded at 1098 (offset 3 lines). Hunk #5 succeeded at 1105 (offset 3 lines). Hunk #6 succeeded at 1148 (offset 3 lines). Hunk #7 succeeded at 1156 (offset 3 lines). Hunk #8 succeeded at 1251 (offset 3 lines). 1 out of 8 hunks FAILED -- saving rejects to file dlls/wined3d/buffer.c.rej What should I do now?