Comment 9 for bug 1219636

So, based on the coords listed in the log, I think I have a theory about what's going on here.

It seems like there are many icons in the Launcher which is creating the concertina effect. So the first test is to right click to open a Quicklist on an icon. When the mouse hovers over the Launcher, the icons expand and many end up off the bottom of the screen. The test is to then go to another icon while the fist Quicklist is still open and then right click on that icon to see if the first Quicklist closes and the new one opens. I think the test is trying to get to the second icon off the bottom of the screen, but the Launcher will not scroll if a Quicklist is already open.

I tested this theory manually, and I do see that behavior. Need to think how best to handle this condition...