RoS v5.1 RB532a - Hi cpu usage from nothing

hello, as in title, i’ve got problem with cpu usage on my rb
i’ve got rb 532a with 128MB cf card mounted, not used and 2 mini pci cards runing on RoS 5.1
yesterday i’ve noticed strange behavior (hi cpu usage) so i’ve reboot board, and cpu back to normal, but now its again something wrong…

whats is going on ?

http://valhalla.urbinek.eu/urbinek/img/mikrotik/2011-05-03-230233_1680x1050_scrot.png
http://valhalla.urbinek.eu/urbinek/img/mikrotik/2011-05-03-230632_1680x1050_scrot.png

anyone ?

i’ve downgraded to ROS 5.1
still same problem…

found the villain…
http://valhalla.urbinek.eu/urbinek/img/mikrotik/2011-05-07-142838_1280x800_scrot.png
but how socks can overburn my CPU even when im not using them ?