A little update from Dublin, Ireland
FYI, folks - I had been having difficulty with updates for some time now, getting "bad checksum" messages.
Many thanks to everyone, though, for the tips in this thread - They seem to have solved the problem, and I'm totally up-to-date.
Just so you're aware:
See Cure #1 (Europe) and See Cure #2 (Europe) did not work for me; eventually, Safer Networking #1 (Europe) allowed me to successfully download my updates.
(ISP is eircom - Location is Dublin, Ireland.)
Thanks again for the info! :)