Comment 2 for bug 423107

I just found this report, after my panel behaved strrangely after switching to a dual-head setup. After searching through the Gnome bugzilla, I found these:

https://bugzilla.gnome.org/show_bug.cgi?id=581519 (panel behaving "randomly")
https://bugzilla.gnome.org/show_bug.cgi?id=594218 (closest to this LP bug report)
https://bugzilla.gnome.org/show_bug.cgi?id=513685 (another)
https://bugzilla.gnome.org/show_bug.cgi?id=562944 (IMHO offers a good solution)

I'll leave it to the original reporter or a maintainer to choose which one to link to this bug. My preference would be to place the panels to the border they were before switching screens, and on the "primary" screen which XRandR 1.3 seems to offer.