http://bugs.winehq.org/show_bug.cgi?id=16379
--- Comment #2 from Rafał Mużyło galtgendo@o2.pl 2008-12-06 19:59:14 --- For me, that line in auto-completion file looks like this: complete -f -X '!*.@(exe|EXE|com|COM|scr|SCR|exe.so)' wine
it's probably same for you.