http://bugs.winehq.org/show_bug.cgi?id=22079
--- Comment #7 from LIGHTNING UK! lightning_uk@imgburn.com 2011-05-14 10:26:19 CDT --- FYI, the context/popup menus rely on the WM_CONTEXTMENU message being sent - there's an event ('OnContextPopup') associated with it and all of my code is in that.
I can see (having added some debug code) that the event just isn't being fired when it should be - maybe because the drag+drop is taking over, I don't know.