Thanks. I actually have homebrew on this machine (similar to Fink and MacPorts) which is where mutt, t-prot, and gettext are installed from. Homebrew installs packages to their own directory and then symlinks their files into /usr/local.

So I guess it's the libintl that appears to be missing or not found in my $PATH that is the issue?

I remember when I had a similar issue after the last OS X upgrade, it was a missing C library that I installed, but not sure which or how at this point. :-(