A bug I found in V0.5.5 is where when you click on the version number to view the changelog, it opens the changelog for 0.5.3, not 0.5.5. Also, I think I've discovered what is causing the bug reported by several players and something I've experienced myself where running doesn't work when you press shift. If you go into custom mode, toggle running off, start playing custom mode, and then quit playing and go into another gamemode, the running stays disabled even though it should enable again when you are in a different gamemode.
