i am having a very irritating problem with my component headers. the corners of the headers are gray, and i can't figure out for the life of me, after reading my coding and reading the tutorials on here, what the problem is. i have made a screen cap, follow the lime green arrows:

apparently the corners are images with names such as http://stat.livejournal.com/palimg/component/curve-top-left.gif/p0ffffff1b3b3b32e5e5e5 but... that doesn't help me much.
if you would like or need to see the code i have i can pase it here.
thanks! :)