As far as I know it's still valid. The most recent discussion of this
was in the thread containing this message:
http://www.mail-archive.com/haskel...@haskell.org/msg65671.html
(I immodestly linked to my own message in that thread because it
contains a summary of the causes of the problem.)
Short of fixing the actual problem relating to Happstack's TH usage that
only seems to occur when running on the Mac, it seems to me that the
most expedient solution would be to assume that IPv6 support exists,
which would allow the offending TH code to be eliminated. This would
then trigger errors when someone tries to build Happstack on a platform
with no IPv6 support, but my guess is that this would be a less common
scenario.
Anton