When trying to build the plugins:
./configure --with-contrib-plugins=all seems to fail at:
No package 'hunspell' found.
Last night, I tried apt-getting this and searching the package manager for it, but I got nothing useful. Today, apt-get doesn't tell me there's no hunspell anymore, so it actually installed that. But I still get the error. It says something about if I installed anything using a non-standard prefix, but I've done everything from the system install itself, to apt getting everything, to making things, all with default options; nothing different or special.