Slow startup at various times

[bvdp]

Hi. I'm using emacs 22.1.1 on Ubuntu. I've got a fairly fast computer 
(Athalon X2 4800) and 2 gig of ram. I don't believe my problem is a slow 
cpu or disk caching.

Most of the time emacs just starts. Fast, clean, nice.

But sometimes there is a delay of 30 to 60 seconds. I assume it is doing 
"something", but by the time time I start up a monitor to check cpu 
usage, it's running :)

Any pointers on why this is happening and what to do to avoid.

Thanks.