Hi, my name is Ben and I'm the co-founder and CTO of Mobile Commons in New York City. When OS X Disk Utility tells you that your disk has “issues” and you must boot up from a system disk and run Disk Utility again, you can simply boot in single-user mode by holding down command-S during bootup and run `fsck -fy` at the command prompt. It does the same thing.
Now there’s no need to (a) look for your OS X install disk or (b) wait the 10 minutes for your system to boot off a DVD.
