I tried today on Ubuntu 15.04 with Gpodder 3.8.1: menu is well visible, so the problem occurs with v. 3.8.4 at/and Ubuntu 15.10
I could check that shortcut for adding new feeds is Ctrl + L, it works on 15.10, so for the moment, waiting a bug correction or the button addition on the panel, I can manage podcasts again :)
I tried today on Ubuntu 15.04 with Gpodder 3.8.1: menu is well visible, so the problem occurs with v. 3.8.4 at/and Ubuntu 15.10
I could check that shortcut for adding new feeds is Ctrl + L, it works on 15.10, so for the moment, waiting a bug correction or the button addition on the panel, I can manage podcasts again :)