http://bugs.winehq.org/show_bug.cgi?id=19592
--- Comment #5 from Peter Urbanec bugzilla.winehq.org@urbanec.net 2009-08-06 07:17:56 --- It looks like the problem appears as of commit 6d4a39409995c91372c182aa55f791d440ba34a1
ole32: Store the marshalled IDataObject in a window property of the clipboard window.
This is somewhat different from how Windows behaves. Windows stores two properties; an IID and an endpoint number.