No problem. I think I've actually fixed this, but the unfortunate thing is that I can't release the fix. I'm in the middle of adding multiplayer support and the code is not in a release state :/ I'll post up here when it is.
There is a lot more debugging information being logged now. That'll help me narrow down Ryan's problem. Here is the full list of changes:
Better Mouse Controls
Beam lights up the area around it
Performance updates - more specifically, the structures draw method and the world draw method have been combined, giving me an increase in 30fps. Player won't notice because the game is fixed at 60fps, but it gives me more leeway for when I want to add features in the future.
Chests now drop items if they are destroyed
W and A can now be used to control the menu.
Top left GUI can now be modded.
Ability to turn audio on/off has been added to the options screen.
Logging support has been added. A game.log file is created in the root folder.