Version: (using KDE 4.0.98) Installed from: Ubuntu Packages Right clicking while dragging a plasmoid causes the drag operation to end without cleanup-- thus, the always-on-top copy of the plasmoid which was being dragged is never destroyed, and you can interact with either copy and updates are shown in both. When I first discovered this, plasma crashed (while dragging the folder view plasmoid). I haven't seen a crash as a result of this since though.
SVN commit 886216 by mart: hide the view on rmb click BUG: 166902 M +9 -0 applethandle.cpp WebSVN link: http://websvn.kde.org/?view=rev&revision=886216