I swapped hard drives a couple of days ago and noticed this corruption when I boot. The logo is normal very briefly, but then goes to this. It doesn't affect anything. Boot is normal and there are no other issues. If I boot from a different drive the logo is fine. I've tried BootXChanger and that seems to do nothing. I have a good copy of the BootLogo.png in System>Library>CoreServices and the correct key linking to it in the com.apple.boot.plist file. Anyone know how I can fix this. It's more annoying than anything (I don't reboot often) but I'd still like to solve it.