Hi, So after lending out my rMBP to a friend who really needed one (as in any decent laptop) for a hackathon event I was handed it back with a warning; sometimes the trackpad was going a little skitz for them. That filled me with dread as it was working fine for me; I immediately turned the thing on and sure enough, within ten minutes the cursor was jumping and became uncontrollable. Also, the left click (but not right click) was feeling sticky. So, as I did when I got the machine back, I asked my friend if they've dropped it/spilt something on it/done something else they can think of. I stressed I wouldn't be too angry as I knew **** happened, but they denied it and I do trust them quite a bit so not sure as to the root cause. After leaving the machine for a while tipped down, it seems fine (albeit still a tad sticky) after use for a while. But I'm worried that it will flare up again, or I will need something else replaced and if it is accidental damage it will invalidate a future claim. So, I'm planning to go to an Apple Store, be totally honest and see what happens. I know Geniuses can be really cool when it comes to Accidental Damage, and that's what I'm kinda hoping for, but I know if my friend is telling porkies that Apple owe me nothing. So has anyone had their trackpad repaired, and if so what costs will Apple charge? Thanks!