I keep on experimenting with Elerea. I'm on my way to achieve a simple Pong game, but the display is awfully jerky, however the sampling occurs on average every 0,0015 sec, which gives 670 FPS. I had a similar experience under Windows. Never really got to find out why it happened. You might try adding a short threadDelay call in your main loop and see what happens; I think it helped back then.
All the elerea-examples run perfectly fine on my computer, however I use FRP.Elerea.Param, which none of the examples use. But there isn't no known problem with Param? Haven't heard of any. Note that Param is essentially the same as combining the Simple variant with a reader monad layer, so it shouldn't affect the basic operation of the library.
Gergely -- http://www.fastmail.fm - Same, same, but different...