Comment 5 for bug 1060580

I marked this as a duplicate of https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1018215 because I'm confident both issues (drag and drop events being lost on panel fade, and lag during panel fade) have the same cause.

It's worth noting neither bugs are present when the Unity plugin is disabled from within CCSM. It's also worth noting that when re-enabling the Unity plugin from within CCSM on Ubuntu 13.10, the panel fade animation during dragging doesn't initate, and neither this lag nor the lost drop events occur. So I conclude this bug is precisely related to the fade animation of the unity panel.