I set up a fresh install of OS X 10.7.5 on a mid 2007's MacMini2,1 and installed my personal stuff like some components via Homebrew. After a few restarts it stopped booting automatically into my OS. The startup Manager always appears now where I can select the boot device. When I press the option-key during boot, everything is like normal. It seems like the option-key-function is inverted?!
Anybody else got this? How can I repair EFi?