[probizzle]

Also,

make SURE no stray printfs are being calling before Initialize_Serial_Comms() is called.

If you do this, your rc will go into red-green led mode every time you reset it. So you'll have to end up downloading your code ALL the time.
(I'm assuming ifi-loader will do these initializations for you the time you are downloading code, and as this won't happen later, you get the crash. dunno though.)