https://bugs.winehq.org/show_bug.cgi?id=44843
--- Comment #2 from katsunori.kumatani@gmail.com --- I think you're right. I was using a classic W2k theme all along, so I didn't notice and assumed Wine just used the desktop cursor theme. (well, Compiz with cursors is a bit buggy anyway, but I'm sure you're right)
If the other bug exists (not using desktop cursor) I think this bug has to be closed as invalid, or just rename this bug if not.
By the way, can I just replace the dlls/user32/resources/*.cur files with a pre wine-2.12 version before compiling wine, and have the old cursors? Because that's an easy workaround if it works and doesn't add some bugs or something. (do I have to remove the *.svg files or it will fail to build?)