http://bugs.winehq.org/show_bug.cgi?id=25494
--- Comment #15 from Rosanne DiMesio dimesio@earthlink.net 2011-12-09 19:48:45 CST --- (In reply to comment #14)
Try this now please. Commits 197d41156a1a237eb2073524ec36006d6a26ceaa and b0f704daaf633d8c713c9212a2ab5dd8a4457e7a fix file encoding for me, so now all .docx files are in UTF-8 as they should. Office 2003 + compat. pack opens it without a problem.
Excel and Word 2007 can now open files saved by Office 2010.
That leaves the one docx file I mentioned in comment 13; Word 2010 still can't open it without native msxml6, though Word 2007 can. Do you want me to file a separate bug for that issue? Other than that, this bug appears to be fixed.