Problem connecting between debian and Ubuntu

[Loïc Grenié]

   Hi,

   I've two computers, one with Debian the other with Ubuntu.
  The Debian computer has v1.0.14, the Ubuntu v1.0.11. They
  do not manage to connect with error "wrong keylength": the
  Ubuntu computer sends a 512 byte key to the Debian computer
  which expects a 256 byte key.

    Is it expected ?

    Is there a configuration option somewhere that I've set
  differently on the computers ?

      Thanks,

            Loïc