This has prob been discussed before but RIM on twitter were a bit confused by this one, I have a 9300 on T-Mobile UK (OS 5) and a few weeks ago the trackpad seemed to have a bit of a problem being used if the sun was out, it randomly shoots around all over the place, Works fine indoors and at night.
Just wondered if there is a fix for this or its just a hardware issue and i will have to endure the dread of waiting for T-Mobile repairs for a couple of weeks.
PS: I tried adjusting the settings in "Screen & Keyboard" but still does it.
I have noticed change of trackpad behavior under sunlight in a hot day. Haven't experienced any jumps but trackpad becoming less responsive than usual.