I’ve compiled some new text-only Unison binaries, version 2.43.16. Feel feel to grab them if they help you

• Linux binary (Ubuntu): unison-2.43.16-linux.zip (~750kB)
  (compiled with gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5))
• Win32/Cygwin binary: unison-2.43.16-cygwin.zip (~600kB)
  (compiled under Cygwin 1.7.1/Win2k3 32bit SP2)
• OSX (Snow Leopard) binary: unison-2.43.16-osx.zip (~660kB)
  (compiled under OSX 10.6.4)

As usual, Unison is pretty easy to compile. Just install OCaml, check out the latest Unison trunk, and build with “make UISTYLE=text”.