http://bugs.winehq.org/show_bug.cgi?id=32945
--- Comment #2 from Nikolay Sivov bunglehead@gmail.com 2013-02-10 21:25:11 CST --- It's the one with md5 ebc5bb904cdac1c67ada3fa733229966 ? I extracted it from installer archive and it's an application provided module which happens to be named like windows system dll. I'm not sure if it's the same thing but it looks like Office 2007/2010 failure to pick riched20 from application directory and using builtin one instead.