http://bugs.winehq.org/show_bug.cgi?id=30179
--- Comment #2 from Athrun samurai_no_densetsu@yahoo.es 2012-03-16 16:03:28 CDT --- A small update. Looks like that they did a better work with later versions of the games since patching it to its latest versions solves the issue. I didn't applied it earlier because almost all units are tweaked and the game itself becomes too easy (for my taste).
Knowing this I am not sure if it worths the effort so I will let you choose about fixing or not.