When you drag a freely movable panel with a plugin that uses the screen-position-changed signal, it gets the signal 2 times when you stop dragging the panel. Reproducible: Always Steps to Reproduce: Expected Results: Send signal 1 time.
Hmm, that is indeed annoying. If someone could try to find out why, that would be very helpful ;-)
I'll give it a shot within a couple of days
Signals were being connected more than once. This is hopefully fixed with revision 20355. Please reopen if it isn't.