http://bugs.winehq.org/show_bug.cgi?id=33852
--- Comment #11 from William Roberts wlroberts@tru.ca 2013-06-22 19:00:11 CDT --- Well, that is interesting. When I use Rybka, the variations show up. When I use Houdini or Stockfish (http://stockfishchess.org/download/), the variations don't show up. All three engines work fine under Windows.
Change engines from the Options menu, Engine, and choose the new engine using the Browse button.