I really like the speed of the 4.3.0 release. Thanks for that improvement. I had basically given up using full-screen mode before because of the slowness, but it is great now.
I did notice one obscure thing. While using Xinerama in full-screen mode, my custom root pointer is not drawn on the root window of the second monitor. This is with:
xsetroot -cursor bitmap.bm mask.bm
The default "X" cursor works fine, as does picking a named cursor with
xsetroot -cursor_name hand1
I don't think there could be anything weird about my bitmap. It works fine on Linux using Xinerama with XFree 4.2.0 and on all of the platforms I have used without Xinerama.