http://bugs.winehq.org/show_bug.cgi?id=3542
--- Comment #67 from Walter Woden wodencafe@gmail.com --- (In reply to comment #66)
This doesn't look like an internal wine thing. Somehow wine doesn't recognize the executables. Probably you see a difference if you check the executables with the "file" utility.
This is what I am seeing as output from the executables with the file command: wodencafe@ubuntu:~/.wine/drive_c/Program Files/Bullfrog/Keeper$ file keepd3d.exe keepd3d.exe: PE32 executable (GUI) Intel 80386, for MS Windows wodencafe@ubuntu:~/.wine/drive_c/Program Files/Bullfrog/Keeper$ file KEEPER95.EXE KEEPER95.EXE: PE32 executable (GUI) Intel 80386, for MS Windows