The Me Menu on the top panel does not let me type a status to post to Gwibber or Pidgin. It simply is a grayed-out box that says "Post message..." I cannot type into it. Also, the status selector only works (not grayed out) when Pidgin is logged in; I cannot go from offline to available.
I already tried re-installing indicator-session, indicator-applet-session, indicator-me, gwibber, and gwibber-service, and removing and re-adding the applet.
Edit: Here's the console output when running Gwibber. It throws some errors, but none seem to be relevant.
** (gwibber:7611): WARNING **: Trying to register gtype 'WnckWindowState' as enum when in fact it is of type 'GFlags'
** (gwibber:7611): WARNING **: Trying to register gtype 'WnckWindowActions' as enum when in fact it is of type 'GFlags'
** (gwibber:7611): WARNING **: Trying to register gtype 'WnckWindowMoveResizeMask' as enum when in fact it is of type 'GFlags' /usr/bin/gwibber:73: GtkWarning: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed gtk.main()