Screenshots consist of nothing but lines

[gusp]

Here is a screenshot from my desktop (Mac OS 10.5.7 on a Macbook):
http://www.pixentral.com/show.php?picture=1rdlipCHzOvcONvVXpdSXD9Wxeno

I have no idea why they look like this but the greenish colors fit to the desktop image (grass image that came with OS X).

Any ideas how to fix this?

 

[MacDawg]

Try resetting your PRAM

Woof, Woof - Dawg