Edit, 8/5: Thank you, to all who responded. I think I fixed the problem. I think the blogtalkradio widgets for the two Bogus Barry's Birthday Bash programs were causing some difficulty, especially with Internet Explorer. I'll have to test them, if I use them next time.
Thanks again to all who replied! Susan and Robert were especially helpful, as they went the second mile.
Anyone: if you continue to experience any problems, please do comment or send an email to firstname.lastname@example.org
I'll probably remove this post after a day or three.