I have installed 8.04, and I have continuous problems with losing network connection (at least this is what I have diagnosed).
Top shows that ksoftirqd is running at 100%, netstat -tap shows a LOT of connections, the fan of my computer is speeding up. I had no problem with 7.10.
it seems to be related with the wireless (atheros, on a Toshiba Satellite): the problem did not show up when using wired network connection. I saw that this problem existed already at earlier releases as well.
Anyway, I erased 8.04 and returned to the stable 7.10, where I had no problems.