Debian Lenny upgrades: watch out for the bnx2 firmware!
While installing a new server, I noticed that Debian kicked the bnx2 firmware for the Broadcom NetXtreme II (like found in HP DL3xx and Dell PowerEdge servers), to non-free. The installer kindly asks to provide the firmware on an USB stick. That can be quite annoying. but if you install a new server, it's not such a big problem as you won't break any existing things.