Gnome 3.6, Tracker, Transmission problem

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https://bbs.archlinux.org – Hi guys, from about 1 week ago i notice a problem while using Transmission on my Gnome 3.6 machine which never appeared before. When I open Transmission and it starts downloading files, a tracker-extract process appears on system monitor in the Sleeping state and takes the 100% of CPU until i close Trasmission or wait 10-15 minutes. If I try to terminate it nothing happens, if I try to kill him it automatically restart himself with another PID. Closing Trasmission all goes ok, reopening Transmission my fan restart to rotate like an helicopter; same thing also after a computer restart. Waiting (HowTos)