I have Ubuntu 14.04.3 LTS 64 bit and Nautilus 3.10.1. I experience the same problem repeatedly. All other shortcut keys work, Ctrl+h, Ctrl+f, etc. Just Ctrl+l stops working after a while. The Go -> Enter Location menu entry also stops working. Restarting Nautilus always solves the problem.
I have Ubuntu 14.04.3 LTS 64 bit and Nautilus 3.10.1. I experience the same problem repeatedly. All other shortcut keys work, Ctrl+h, Ctrl+f, etc. Just Ctrl+l stops working after a while. The Go -> Enter Location menu entry also stops working. Restarting Nautilus always solves the problem.