>>>>> Uwe Brauer wrote:

>> Performing jabber again after loading tls.el (not tls.elc) will
>> make the cause of the problem more clearer.  (I'm ignorant of
>> jabber though.)

> I am not so sure, after loading the file and debug-on-error t

> I obtain
> --8<------------------------schnipp------------------------->8---

> Debugger entered--Lisp error: (error "Selecting deleted or non-existent buffer")
>   set-buffer(" *-jabber-process-*")
>   (save-current-buffer (set-buffer buffer) (message "Opening TLS connectio...
>   (with-current-buffer buffer (message "Opening TLS connection to `%s'..."...
[...]
>   open-tls-stream("jabber" " *-jabber-process-*" "talk.google.com" 5223)
>   jabber-ssl-connect()

I see.  The workaround is: