The last line of my snap handler is
modifyResponse (setHeader (mk $ fromString "Server") $ fromString "server-name")
, but the Server header still is "Snap/0.8.0.1". Other functions seem to be working fine, such as setContentType and setResponseCode. I've had the problem since I first tried using it, which I think was Snap 0.6. Adding a header doesn't seem to be a problem.
Fixed and released with 0.8.1.1, thanks.