Step to reproduce:

 (add-hook 'rcirc-mode-hook 'rcirc-omit-mode)

When rcirc trys auto-connect to channels, emacs will show

 (error "`recenter'ing a window that does not display current-buffer.")

Patch attached

In GNU Emacs 24.4.50.6 (x86_64-unknown-linux-gnu, GTK+ Version 3.12.2)
 of 2014-06-14 on isil
Windowing system distributor `The X.Org Foundation', version 11.0.11501000
System Description:	Debian GNU/Linux unstable (sid)