hi, i'm having problems with a very simple example using conal elliott's 'reactive' library: module Main where import Control.Applicative import Control.Concurrent import Control.Monad import Data.Reactive import System.Random main :: IO () main = do (e, snk) <- mkEvent forkIO $ forever ((getStdRandom random :: IO Double) >>= snk >> threadDelay 10000) runE (print `fmap` withPrevE e) return () which starts to output this after a while: reactive_loop.hs: <<loop>> this is with ghc 6.8.1 on osx 10.4. any ideas what might be going wrong? many thanks, <sk>