After installing the last OS X/security updates, my Mac Pro started taking well over a minute to boot up--much longer than my PowerBook. I repaired permissions, didn't work. I archived and installed OS X again, didn't work. I reformatted and did a clean install, cut it down to about 30 seconds to boot, but that's still extremely slow. Then I rebooted into Verbose mode and was getting a "kextd_watch_volumes: couldn't set up diskarb" that was holding up the boot for a good 30 seconds. I took out the PRAM battery, didn't help. I help command+option+p+r and zapped the PRAM (until it chimed a total of 4 times.) That seemed to do something. Now, the computer boots in about 5 seconds. The Apple logo pops up instantly, but then I get the little spinning thing (Not beachball, the spinner that comes up after installing updates) that lasts about 5 seconds. Then it just shoots straight to my desktop. No "Loading OS X" screen with a progress bar, just straight to the desktop. Is this pretty irregular? Is it something I should be worried about? Could it be hardware based? I'm at work right now, so I can't call Apple.