Hi I have my MBP now for about 5 yrs and it has been performing like a star! Today I have been working on it like I usually do, nothing new. Then Adobe Acrobat told me a new update was available. I attempted to install the new update, but was toldby Acrobat notifier that something was wrong so the installation did not succeed. Unfortunately I can't remember what was the problem withholding Acrobat from completing the update. Then I switched my MBP off for a couple of hours after I was done working. Switched it back on a couple of hours later and then this: I opened an Adobe Illustration document to continue working on - then my MBP just continued scrolling the document all the way to the bottom even after I lifted my fingers from the trackpad / pen from the tablet. The same thing happens in ALL applications: Firefox, the download list, iTunes. The entire MBP just keeps on scrolling to the bottom as soon as I move the cursor over the area. After restarting a couple of times it seems that the problem had dissappeared, but then it came back again. I tried to restart again 3 times and then my MBP returned to normal. Otherwise I wouldn't be able to type this I have deselected Firefox--> Preferences--> Advanced--> Use autoscrolling/ Use smoothscrolling. Does anybody have any idea what could be causing this erractic scrolling behaviour? And does anybody have some advise on how I can disable this? Thank you in advance!