Hi (I guess mainly Ross, but others might be able to help as well) http://hackage.haskell.org/trac/hugs/ticket/29 has a comment that pretty much describes what is happening - I can fix it, but don't know what else I might break, and it would likely break on Linux too. This is the single critical bug for the next release that is assigned to me, so I have an interest in fixing it :) Thanks Neil