Comment 4 for bug 1479064

Thanks for the help so far on IRC.
Here's what I have found so far:

GtkTreeView's globalRect: 225,270,122,242
GtkTreeViewAccessible's globalRect: 224,269,122,242

So the coordinates seem to have come off by one pixel in the X and Y direction, but the size did not change. Making the globalRect comparison less strict (or even implementing a "second try" strategy in the comparison) might work, although it is no pretty solution.