Hi, The json/haskell-json package has a cabal flag named "mapdict" which is disabled by default. I find this completely counter-intuitive as the default behavior will convert Data.Map values to JSON *list* values. With the flag enabled, Data.Map values will be converted to JSON map values as expected. Just to give a concrete example: Default behavior:

import Data.Map import Text.JSON putStrLn $ encode $ insert "foo" "bar" empty ["foo","bar]

With mapdict enabled:

import Data.Map import Text.JSON putStrLn $ encode $ insert "foo" "bar" empty {"foo":"bar"}

The only possible reason that I can think of for this default behavior would be some sort of performance metric, but I doubt that it would be significant, especially not for such improper behavior. Would it be possible (i.e. technically trivial and not against policy) to add "--flags mapdict" to the configure command in the haskell-json PKGBUILD? I'll send an email to the json maintainer as well to see if I can get the default changed. Thanks! Regards, Xyne