[Haskell-cafe] Haddock chokes on function arguments

Hello, while trying to generate Haddock documentation (Haddock version 2.9.2, (c) Simon Marlow 2006), it chokes on the following fragment -- |Apply a given function over all elements of a list and select one of the -- results. selector :: (Arbitrary b) => [a] -> -- ^ Elements to select from (a -> b) -> -- ^ Constructor to apply to selected element Gen b selector list ctor = oneof (map (return . ctor) list) with the following error message: ' parse error on input `-- ^ Elements to select from I am puzzled as this is exactly how arguments are supposed to be documented, according to http://www.haskell.org/haddock/doc/html/ch03s02.html#id565220 Any clues ? Arnaud