v0.644 Framerate Issues Resolved?

[Glitchless]

This latest client was to address issues with the game running choppy after being open for a while. Please give us feedback on whether or not the new client (which is now using a higher java version which could have removed some old java bugs) is running better over long periods of time.

Edit: Note your game will always appear choppy if your mouse cursor is not currently over the game window. This is because we force it to render slowly if it's not your main window so that if you are running other applications (or multiple instances of the game) they won't be competing for CPU resources.