System Information
Win7 x64, GTX 560

Blender Version
Broken: e79b244097ae1a416edbd0e28cfd6f07bc2e2daa
Worked: 2.69

Short description of error

When loading a blend file, a crash will occur during keymap initialisation if an addon with a keybind was disabled then re-enabled in the previous blend.

Exact steps for others to reproduce the error

1. Give an addon operator (e.g. Import SVG) a new key binding.
2. Click Save User Settings in the prefs window.
3. Disable the addon with the new binding.
4. Enable the addon again.
5. Open an existing blend file.