Random short freezes

[user1]

>> Marcelo
> I have had the same problem since upgrading to kubuntu 10.10 on my
> AMD64. I found out that the GPG program was using about 83+% of the cpu
> clock cycles.
> When I closed it, the problem went away.  You may want to use your
> System Monitor to check for programs like this.

Sometimes when I see weird behaviour, I do a software update, and most 
often that helps?