I have a 1.83 MBP, with 1.5 gigs of RAM (stock 512 + additional crucial 1gb) 80 gig HD. Pretty standard. My issue is that once in a while when I restart my machine, bootup is really slow and then I get a weird screen glitch. Often I won't get a full re-boot but will get a half appearing dock and no desktop icons. Sometimes it will have lots of grainy lines across it. Sometimes I will get the beach ball for extended times and it will just freeze there. Basically I keep restarting it, and eventually it goes away and boots up normal. The thing is I can't really replicate the problem. It just happens at random. Sometimes it happens after I have a system crash, and I need to restart, and sometimes it happens just after a system update restart. Like I said, it doesn't happen that often, but when it does it kind of freaks me out. I've had the logic board replaced in the past to eliminate the "whinning" (which, thankfully is now gone) and I wonder if this is another logic board problem. Other than that the computer has been great. And upon the complementary Applecare expiring pretty soon, I wonder if I should take it in for a repair or just not worry about it. It's kind of hard to take it in if I can't really show them the problem. Any thoughts, comments, suggestions, or ideas?