So tonight I was trying to launch bootcamp when booting up my iMac with Lion on it - but holding down alt when starting up wasn't working like it always has. So I got the idea to just boot using the startup disk option is system preferences. Except when I go in there - it no longer shows up? I use Parallels, and I can still boot into Windows 7 using Parallels from my boot camp partition... I can even see the partition in disk utility and it appears on my OSX desktop. I repaired permissions and checked the disks... I booted into single user mode and checked the disk there as well - everything was fine. There doesn't seem to be a rhyme or reason to it. No recent updates or anything. Out of nowhere its just not allowing me to use it. Any ideas what has happened or what I can do to fix it? I really don't want to reinstall my bootcamp.