We ship a /opt/thinlinc/etc/ssh_known_hosts with the host key for our demo system. However, this path is referenced directly by SSH; our binary has this path hardcoded. This means that if the client is installed with some other prefix, then this file is not found. In practice, the fact that you need to accept the demo system host key is perhaps not a big deal, but since we have this functionality, it would be nice if it worked on all platforms.
One example of a platform where the prefix is not thinlinc is Futro/eLux.
This got fixed as part of bug 4242.
Bug 4242 didn't touch any code related to this. Huh?
Comment #1 should be a reference to bug 4557.