OpengGL lockup using GHC 6.6 on Intel Mac

I just installed ghc 6.6 from MacPorts and am trying to use the Haskell ported NeHe OpenGL lessons to play with OpenGL. Unfortunately, when I load the lesson in ghci and then run main the screen turns to garbage and I am forced to power cycle the machine to get back to my desktop. It's not a complete lockup as I an Alt-Tab between apps and the selector UI appears. Selecting an app, though, does nothing and I have no access to the desktop. Anyone know of any issues with the current HOpenGL on Intel? The code comes from this link: http://www.codersbase.com/index.php/Nehe-tuts Don't worry about darcs. You can select the URL for the repo and get the code directly form there. Thanx, joe