http://bugs.winehq.org/show_bug.cgi?id=13314
--- Comment #16 from A Wine user RandomAccountName@mail.com 2010-04-07 13:44:11 --- I finally found the commit that caused this behavior to appear, though I had to go a bit further back than 0.9.61:
72d5e7cd36af48418436deca83e308d55b0ae3d2 is first bad commit commit 72d5e7cd36af48418436deca83e308d55b0ae3d2 Author: Kirill K. Smirnov lich@math.spbu.ru Date: Mon Jul 16 19:19:06 2007 +0400
programs/start: use SEE_MASK_NO_CONSOLE flag as default.
Allows to start console applications in a new window (as Windows does).
:040000 040000 9a5ae043bdb3cbc15d073bdf01a74fdd47b0d9b0 ba52fee5ca988ef853cff6e1bacbd15a1a0e60fe M programs
Perhaps it became visible in 1.0-rc1 due to some other change, such as a change on the bug reporter's system to open Windows programs with "wine start /Unix" as opposed to just "wine"? I can see it by running wine start [/Unix] some_win16_app.exe, whereas there's no extra window when using wine some_win16_app.exe.