I've been having this problem as well and found this yesterday:
http://forums.fedoraforum.org/showthread.php?p=1295009
It's for Fedora, but trackerd seems to be having this issue one other distros
as well. I tried the suggested fix yesterday and trackerd hasn't started going
crazy since. I'll
I ran xev and turned the wheel a bit and the event is repeated
infinitely. The only thing I could find that would stop the repeating is
to Ctrl-Alt-F1 to a different terminal.
KeyRelease event, serial 34, synthetic NO, window 0x361,
root 0x7a, subw 0x0, time 18887985, (167,-11),
