Wallpapers vanish

I found a couple of articles about this:

http://support.microsoft.com/default.aspx?scid=kb;en-
us;329677&Product=winxp


http://support.microsoft.com/search/default.aspx?
InCC_hdn=true&Catalog=LCID%3D1033%26CDID%3DEN-US-KB%
26PRODLISTSRC%
3DON&withinResults=&QuerySource=gASr_Query&Product=winxp&Q
ueryc=wallpaper&Query=wallpaper&KeywordType=ALL&maxResults
=150&Titles=false&numDays=&InCC=on
>-----Original Message-----
>My wallpapers keep disappearing....they will be there
for a little
>while and usually after a reboot there is nothing there.
>
>What would cause this? I tried using lower file sized
wallpapers like
>400 k or less and the same thing happens.
>.
>