> Does it maybe try every key and decide there are too many
> that don't work when I go over a certain number?
That's exactly what it does, unless you explicitly specify which key to
use. This can be done from command line or in ~/.ssh/config (with
hostname/IP match)
OK. I learn something every day :-). I guess I never had
that many keys before. I'll get rid of some of the extra
ones I made when experimenting with all the new kinds
of keys in newer versions of ssh.