Well I've run into the same problem no longer than yesterday and as a matter of fact some minutes ago
ssh <email address hidden> .. fails with:
... debug1: Server accepts key: pkalg ssh-rsa blen 277 Agent admitted failure to sign using the key. ...
SSH_AUTH_SOCK=0 ssh -v <email address hidden> .. succeeds with:
.... Hi ..! You've successfully authenticated, ...
Well I've run into the same problem no longer than yesterday and as a matter of fact some minutes ago
ssh <email address hidden> .. fails with:
...
debug1: Server accepts key: pkalg ssh-rsa blen 277
Agent admitted failure to sign using the key.
...
SSH_AUTH_SOCK=0 ssh -v <email address hidden> .. succeeds with:
....
Hi ..! You've successfully authenticated,
...