http://bugs.winehq.org/show_bug.cgi?id=30245
--- Comment #5 from zhchengsmile@gmail.com 2012-03-25 20:17:01 CDT --- Well.
I try to debug this issue, and find some clues:
In dlls/winex11drv/clipboard. c:
builtin_formats [] ... {CF_UNICODETEXT, XATOM_COMPOUND_TEXT, X11DRV_CLIPBOARD_ImportCompoundText, X11DRV_CLIPBOARD_ExportString}, ...
Change X11DRV_CLIPBOARD_ImportCompoundText->X11DRV_CLIPBOARD_ImportUTF8
will solve the problem, but I don't know why?