We have run into an issue that it seems other people have already found but has apparently not been resolved, yet. It manifests as with the error "HTTP request failed with: Unsupported socket". The problem is described in two places with different workarounds. http://code.google.com/p/happstack/issues/detail?id=88 http://groups.google.com/group/HAppS/msg/0c9a0d0fd7c6aff0 One workaround is to rewrite part of the network package, and the other is to downgrade the package. It could be the case that the rewrite came from the older version, though I'm not sure. I'm curious if it is possible to fix this, either in Happstack or the network package, once and for all. The workarounds are rather painful when so many things depend on the network package. Thanks, Sean