Ok, I honestly don't remember if it was always like this or this behavior just started after updating to 10.5.7. When I start my MacBook and it gets to the Login screen, the trackpad won't "fully" work. What I mean by this is that I can move the cursor around with the trackpad but I can't click (or double click) with a tap on the pad, to select with which account I want to log in. To perform this last step I have to use the click bar below the pad to select the account. What gives? Normal behavior or bug?