I have only one server, one VPS, which has had everything working very well since then (it's been under heavy development and customization, without any core hacks :D for about the past two months)... however when I came to provision a new site now, as I normally would.
first I got the error for bad ssh authentication like when you are trying to connect to a server which has been physically changed ...
when I tried to clear /var/aegir/.ssh/knonw_hosts I get the following error about 4 times or so
Dummy connection failed to fail: Host key verification failed.
when I try connect to the server (from inside the VPS) in order to renew the server's finger print on file I get the same error any ideas ??