[HOpenGL] Sporadic idle function

Hey. First off: the hopengl bindings are amazing. I've already had a lot of fun with them. When I'm doing interactive stuff there is no problem. However, I've come across a problem with something which should be way simpler: I'm playing with a simple particle system in haskell using hopengl on mac os x. My idle callback function is only getting called sporadically, while the window has focus. If a different window has focus, the idle function is working fine, and everything is updating great. I can post the code, but there's a lot, and I'm wondering if this is a common problem that you guys have seen before. Thanks for reading Robbie