Ok, i've found a minor bug. My setup is a Laptop and an external monitor. THe program rocks for using multiple wallpapers in vista! The way i have my drivers setup is that my Laptop runs a 1440x900 resolution, and my monitor runs 1920x1080. All my wallpapers are 1920x1080 so they get scaled down on my laptop (which is perfect). However, i have my driver setup so that if i close my lid, the external becomes the main monitor, and the 1440x900 becomes 1920x1080 (it's now on the tv). This however presents a weird issue. The scaled down wallpaper does not scale back to it's original size, so i'm left with 1.5 wallpapers on the new monitor (a 1440x900 with some black under it and the remaining space is filled with the 1920x1080 picture that was on the external). Just making this aware, and seeing if there are any fixes. Pictures posted here:

Vista seems to make a true primary screen switching.
DF would have to be able to detect that switching and create the background image just the other way round. Of course the switching back should also be detected.

Perhaps the switching could be detected by getting notified of the PrimaryScreen's DeviceName. :huh:

Regards,
xasx