This is a SECURITY UPDATE. We recommend that _everybody_ upgrade, as
soon as possible.
This version fixes a security hole in previous versions of PuTTY,
which can allow an SSH2 server to attack your client before host key
verification. This means that you are not even safe if you trust the
server you _think_ you're connecting to, since it could be spoofed
over the network and the host key check would not detect this before
the attack could take place. The attack can allow the server to
execute code of its choice on the client.
This vulnerability was found by iDEFENSE, who we expect to release
an advisory on the subject shortly.
Travis, please bump to 0.56 asap
Thx for the notification and swift resolution folks.