Pantheon files cause high hdd and cpu usage when window moving

[Jacob S.]

Each time when I move pantheon-files window it causes hdd crunch sound and high cpu usage in 2-5 seconds. When I click a "close" button in this period, window is not closing.
As far as I know pantheon files is a fork of nautilus, so when I tried nautilus, there is no such problem.

My system is:
Phenom II x4 B35 Processor (unlocked Athlon II x3)
Seagate ST3750528AS (750Gb)

elementary OS luna with all fresh updates at this time;
kernel: linux-generic-lts-raring;
no proprietary drivers installed.

Please specify what other information I can post to confirm this bug.

Added:
The 'top' utility shows that dconf-service is going crazy, not pantheon-files process itself. But bug is still there, when I use pantheon-files.

After some investigation I've found that if I run command "killall -SIGSTOP dconf-service", the problem is gone, but after that I can't close pantheon windows, like pantheon-terminal, pantheon-files and so on.