>I think you stumbled on the good old "evaluation order is not specified"
>thingy ... If the right hand side of the append is called before the
>left hand side, it is not going to work. How about this code:
>
>let rec traversedir dir =
>  try 
>    let d = Unix.readdir dir in
>    d :: (traversedir dir)
>  with
>  | End_of_file -> []

You are building a stack of exception handlers here as well... you might want to go with:

let traversedir dir =
  let dd = ref [] in
  try while true do dd := Unix.readdir dir :: !dd done
  with End_of_file -> !dd

Disclaimer: I didn't run this code :)


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