Just installed 2010 kde final and am enjoying the desktop experience. Now come the questions...

When the KDE login screen is loading (the one with the animated icons showing that stuff is loading), the desktop graphics are razor sharp. As soon as the login process completes and the desktop is fully loading, the resolution of the wallpaper noticeably drops and becomes fuzzy.
Is there any way to maintain the sharper graphics?
As a side note, all other graphics on the desktop are sharp, it's just the wallpaper that goes fuzzy.
The display is a 1920x1080 emachines display.
TIA,
mikkl