Right. Gone back to the earlier version of Firefox. Problem persists. Not only with the browser, but with email client, (Tbird) and Limewire as well. Sounds firewall-y, but nothing has changed there.
Could even be intermittent connection, but since it generally only lasts five to fifty seconds and the modem is in a different room, it hasn't shown anything.
Couple of other software updates at a similar time, it's time to start troubleshooting, darn it.