[Haskell-cafe] Cabal upload failure

Hello! I'm trying to upload a new version of syntactic, but Hackage gives the error: 500 Internal Server Error <stdin>: hWaitForInput: invalid argument (Invalid or incomplete multibyte or wide character) In fact, I get the same error if I use the "Check" functionality on the earlier version that is already on Hackage. Any idea what causes this? / Emil