http://bugs.winehq.org/show_bug.cgi?id=33467
--- Comment #4 from Ken Thomases ken@codeweavers.com 2013-04-27 17:14:44 CDT --- I do most of my development and testing on Snow Leopard so, if there's any difference between the behavior on different versions, the Snow Leopard behavior is most likely to be what I intended. :)
I'm surprised there is a difference in the Mac driver's behavior between Wine 1.5.27 and 1.5.28. The only commit that I see that happened in there that might possibly affect this is commit 2e226b9ad8cd86b4ad6b5a73effa9fa7d5d03958. Are you able to test Wine 1.5.28 with that commit reverted? I'm just curious at this point to know what might have changed the behavior.
I will also put the enhancement request on my to-do list. I needed to add the infrastructure for registry settings to control Mac driver behavior, anyway. :)