kio_thumbnail high CPU usage


using openSUSE 12.2, KDE 4.9.2
Sometimes I notice that my laptop’s fan does not stop and is busy for a long time. Even if I do nothing
So I found that is kio_thumbnail using up to 100% cpu. When I close Dolphin - kio_thumbnail exits and fan stops after few secs. I restart Dolphin and all is still OK. This only happens few times a week

Tried googling - there were some memory leak bugs but all are resolved.

Anybody else notice same issue on 12.2 + KDE 4.9.2 ?