I just got this message in Freenode:

Msg {
    pfx: Some(
        User { 
            nick: "e",
            user: "e@freenode/staff/spy.edk"
        }
    ),
    cmd: PRIVMSG {
        target: User("$$*"),
        msg: "...",
        is_notice: true,
        ctcp: None
    }
}

Shown as:

Here the tab name is right (a PRIVMSG sent to $$*, it looks weird but there's no other way to show this message I think) but sender should be e, not my nick.

I suspect this is introduced with db38123.

We should first start testing this stuff (#273) before making any more changes to showing PRIVMSGs, as the logic is already complex enough.