[Haskell-cafe] hGetLine problem

Herro, thanks for your feedback on my last question, it helped quite a bit. I continued toying with my toy web server, and I'm "sometimes" getting "Invalid argument" errors in hGetLine for a handle I retrieved from Network.listenOn. "Sometimes", because it works fine in the browser, except when I reload very frequently -- maybe it's related to some concurrency issues (I'm using forkIO to spawn off the handler process from the main server loop). When I wanted to benchmark the server using "ab" (Apache Benchmark), it didn't even "survive" one request but Fail'ed using that error message - ": hGetLine: Invalid argument". I tried adjusting the buffering mode. Do you have any ideas? Cheers, Michael