Every once in a while. I've done reboots and such, still the cursor freezes sometimes. I wonder if I take it to the Genius Bar if they will see it. It happens on rare instances. Is it worth bringing it in? If they replace parts, are they new or refurbished? I got the Penryn 2.4 MBP as a replacement to my 2.2 SR (last year's model) MBP about three months ago because that thing needed a ton of repairs and was a lemon.