Why hald causes system to hang up?

[Yuri]

I enabled hald: hald_enable="YES" in /etc/rc.conf. This fixed the 
problem with kdm which otherwise always fails during the first login 
attempt.

But hald caused few unintended consequences:

periodic hangups: system becomes unresponsive for a few seconds around 
every 15 seconds, especially when I type in KDE konsole.
string in konsole doesn't get selected any more when I double click on it.

Anybody has any insight why hald would cause such consequences?

Yuri