"hSetBuffering stdin NoBuffering" messes up terminal

On my terminal (aterm), calling hSetBuffering stdin NoBuffering within my program messes up the terminal settings somehow, so that backspace no longer works when I run my program (without the NoBuffering) a second time. The 'reset' command fixes the problem, so once again backspace works, but my program shouldn't be affecting the terminal state at all. A simple call to hSetBuffering stdin LineBuffering doesn't seem to fix the problem. Any ideas what might be going on here? It's really annoying to not be able to use backspace when entering data. -- David Roundy http://www.abridgegame.org