External monitor on the left dual-head configuration
I have in my laptop GeForce 9600GS. Described problem exists in both
lastest stable and latest beta nvidia drivers(x86_64-185.18.36, x86_64-190.42).
Often I connect external CRT(1024x768) monitor with VGA. This monitor is physicaly placed on the left of built-in laptop lcd(1280x800). Lots apps has problem in this setup - although I always check "Make this the primary display for the X screen" in laptop monitor setup because of greater resolution than external one It often moves kde4 taskbar and set default dialogs to CRT. I always have to enter native 1280x800 resolution instead of Auto in build-in monitor setup to prevent make external primary.
Also some apps using notification other then KDE one displays them on first from the left monitor(but this could be caused by some hardcoded values not your drivers).
And there is a big problem when I try to disable external monitor without shutting down X's, the left external monitor shutdown but the dialog asking if new settings are ok is somewhere out of screen, so after 15 seconds the settings are reverted back.