Okay, here's what happened, after your suggestion I started searching for
those wallpaper settings and I found
http://forums.whirlpool.net.au/forum...s.cfm?t=394990
Windows XP creates a bitmapped version of a JPG file but does so under
%userprofile%\LOCAL SETTINGS\application data\microsoft and directs the
wallpaper registry string you mentioned to that location. However, since
local settings are not roamed, the user needs to recreate (or actually; let
windows do that by clicking 'ok' in display options) the temporary bitmap on
every computer he/she logs in.
Now my situation was even more worrying, since I went for the delete cached
versions of roaming profiles group policy, effectively deleting the local
settings every single time. This is plain stupid programming by Microsoft, if
you provide the possibility of roaming your desktop wallpaper (which you do
by putting it in hkey_current_user) you should place the wallpaper1.bmp
temporary bitmap in APPLICATION DATA, not in LOCAL SETTINGS. That way the
bitmap is roamed as well...
Any idea how to escalate this to a team that is actually able to do
something about this?