Comment 33 for bug 67189

I did some further debugging, and while I could reproduce the bug initially, I can't reproduce it anymore, even after wiping my keyring and rebooting.

If someone can consistently reproduce the bug, could you pleases try running gnome-keyring-manager and checking whether the "<server name>/<share name>" entries in the keyring have the correct login/password set, or whether these have something like "guest" in them? (In one of my tests, nautilus tried saving the guest account in the keyring, and I suspect it might be a race with nautilus trying to save guest.)

A workaround for nautilus is to kill your gnome-keyring-daemon (pkill gnome-keyring-daemon); this will prevent all interactions with the keyring for all apps, but nautilus should still cache the credentials in memory for the time it's running (instead of persisting these in the keyring).