Turns out this was totally "my bad" -- I really should look closer at my VirtualHost entries!!
I recently started experimenting with IPv6 but I didn't have an entry in ssl.conf to enable SSL mode for my IPv6 address.
Added one in and it seems to be OK now.
[Message sent by forum member 'smcgovern1' (smcgovern1)]
http://forums.java.net/jive/thread.jspa?messageID=356150