The wrap on 1024x768 isn't too bad, mainly due to the type of background you have. If the wrap around bugs you, you could try modifying the forest a little so that the left and right borders of the pic are a bit more similar to each other. Easy way would be to extend the right border of the background pic a little and putting on the half tree (foreground, left edge), but mirrored, into the extended bit.

Dreams are just nightmares on prozac...
Digital WasteLanD