When streaming MC using the OpenGL Game Source, a memory leak occurs causing the game to use as much RAM as it wants. This started in 1.7, and not any previous versions of the game.

For example, Minecraft shows it is using 450MB of RAM in-game, but task manager is reporting java.exe is using 11.5GB of RAM. I tracked it over an hour and the process went from matching the in-game RAM usage to maxing out my system.