Elias, This just started happening when using M-. :
let: Symbol's value as variable is void: find-tag-marker-ring Result of (emacs-version) : "GNU Emacs 24.3.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.10.9) of 2014-05-20 on buildvm-07.phx2.fedoraproject.org"