http://bugs.winehq.org/show_bug.cgi?id=34110
--- Comment #4 from Nikolay Sivov bunglehead@gmail.com 2013-07-22 11:41:11 CDT --- Ah, you're using 64-bit prefix, I almost never use that so there could be surprises I don't know about. I already did some tests and it looks like '&' unescaping is done wrong, that could explain your problem. I need to do more tests and actually try with Excel to confirm.