All is well.
Llorean, I mixed up the order of what you suggested... I ran "make veryclean" first, then started at configure, but I did end up with a correct build. And yes, I was talking about the .zip -- not the player.
Then I got curious, and I made another build including the test_codec, so I could try your solution Cool_Walking_ (I deleted builddir/apps/plugins/test_codec.MAP at the same time). This worked too.
Thanks guys,
Will