I ran gptsync (part of rEFIt) and now I have two protective EFI partitions on my single partition OSX boot disk. The boot disk now doesn't show up in Startup Disk prefpane

Is there a non-destructive way to fix this??!!

gptsync seems to screw up any disk it encounters. Also, Tuxera NTFS stops Boot Camp Windows partition showing in Startup Disk as well (sigh).

Maybe I should have just bought a PC...