Invalid RDP credentials report connection error

Status changed to 'Confirmed' because the bug affects multiple users.

I've been struggling to get past this point as well.
The only connection method working for me now is VNC.

Is something being done to resolve this issue?

There is a workaround.

You can either remove the offending line from ~/.freerdp/known_hosts or
remove the whole file.

Removing ~/.freerdp/knwon_hosts does not work for me. All my conn use NLA for auth.

But I found a way out:
- clear domain name or password in connection setting
- save and connect; input password and domain name again; then conn works well
- disconnect; and re-input password and domain name; then save

It seems after upgrade, remmina could not load password correctly from previous connection config file; but without clearing out, it doesn't write to config either.

I also found that some of cert footprint were written to .freerdp/known_hosts, some not. Very strange.

Yan Liu's workaround fixed it for me - quite annoying after upgrading from Ubuntu 10.04 to 12.04 and having this problem.

It looks like a duplicate of https://bugs.launchpad.net/ubuntu/+source/remmina/+bug/944040

The comments on this issue seem to be off track. This report is not about the fact that some of the protocols don't work, although that may also be an issue. It's about the fact that the error messages in the UI misleadingly indicate a connection problem when there's actually an authentication problem.