Chalk this up to yet another "I should have read the man page first" incidents. I kept noticing that my PATH was not set properly in new Terminal sessions, even though I was 100% positive I set it correctly in my ~/.bash_login. It turns out that the man page clearly states that during login, ~/.bash_profile, ~/.bash_login, and ~/.profile are checked, in that order, and executes the first one that it finds. That prompted me to look around to find the ~/.bash_profile file that I had created when following directions to install an application several weeks ago. Merging the files together, everything went back to working as it should. Live and learn.