Thunar sftp/ssh connection stopps working

[Friedrich Strohmaier]

Hi xfce experts,

since some time thunar doesn't want me to open sftp/ssh connected folders. If I try I get the following message:

Failed to open "/my/remote/path on my.remote.server"
access denied

I *can* connect that server and it's folders via command line sftp/ssh. mc and
filezilla also can do. For some server, presumably with access allowed via
password authentication, I get a password request dialog.

So my assumption is that thunar cannot use ssh-keys/ssh-agent for
authentication.

Archlinux guys could not help, and could not find any issue in bugzilla.

Any ideas how to get further to solve this?

My system:
Archlinux x86_64, xfce4 4.12 Thunar 1.6.10

-- 
Friedrich