Thanks for the reply GPIO. I've been monitoring it today and noticed that it is the cgminer "file" casuing the slow increase in ram usage. Yesterday on intitial restart they were at 2.1%. Today they are at 3.9%.
Still can't fathom why though. It hasn't restarted, still the same instance (767 after the restart) on screen as it was before, all sticks running as requested.
More than happy to flash the SD Card with your current .img file to give it a try. Just means I'll have to go and change the Price Ticker currency again

I am happy to wait until the updates aswell. Its simply issue that a restart solves once a week really.