Unlock screen, wallpaper is black except for icons on the dock?

[CrossFireXT17]

Hey guys, on my Droid OG (happens on various roms) that after I unlock the screen the wallpaper seems to be black besides the dock at the bottom. Not sure why this hapens, but if I just swipe to a new screen it will be fine. It's not really a huge issue, but just can be annoying and wondering if anyone else has had this problem and if they had a fix?

I'm using Launcher Pro.