Putty 0.74
-Security fix: if an SSH server accepted an offer of a public key and then rejected the signature, PuTTY could access freed memory, if the key had come from an SSH agent.
-Security feature: new config option to disable PuTTY's dynamic host key preference policy, if you prefer to avoid giving away to eavesdroppers which hosts you have stored keys for.
-Bug fix: the installer UI was illegible in Windows high-contrast mode.
-Bug fix: console password input failed on Windows...
