Upgraded my server to 3.2 on the night of release.

Since then cpu usuage has been up a bit, not much but periodically server will lag out for 5-10 secs then recover fine. Have re-run a 3.13 server + this doesn't happen...

Cpu sometimes spikes around a lag, but this isn't consistent. Have seen it on both classic and combat + random selection of maps (although eclipse seems to generate it quite often, probably just luck though)

I have heard of other servers experiencing this as well.

I'm randomly testing things so more information as I get it.

We've duplicated the issue, and have consistently seen that this is a result of players creating an NSP folder with just the patch version of 3.2, but never copying their 3.1 ns folder to nsp first.

What your server is doing is compressing ns2.wad and attempting to send it to a player who is trying to connect after making a half-complete nsp folder. The compression uses significant CPU usage, and the send will obviously use bandwidth.