On Xubuntu 15.04 with XFCE 4.12, the bug is still active. There is now no need of the snapshot widget to reproduce the bug. To reproduce the bug, just boot the Xubuntu ISO as a live-CD into a VirtulBox, open a Thunar window then drag it. The Whisker button disappears...
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1397095 Title: dragging applications in the task bar causes repaint errors To manage notifications about this bug go to: https://bugs.launchpad.net/xfce4-panel/+bug/1397095/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs