I was unaware that RB used graphics memory even when it was not doing anything "graphical".

I did a bit of searching around and unfortunately there is no way of increasing the shared graphics memory of 64mb on a macbook. On PC's with integrated graphics chips, it is possible to increase how much system memory the PC allocates to the graphics. I have 2GB and would be very happy to allocate 128mb or 256mb to my graphics.

Lowering the resolution isn't really an option as I quite enjoy watching HDTV, around 50% of broadcasts that I do like watching are HDTV. Turning interlacing on / off is also cumbersome, and with interlacing off, it is really unwatchable.

I guess I'll just have to wait until Mac release a new mini with a better graphics chip, or one day update my macbook.

Thanks once again for your reply Felix.

PS, There is no way I can somehow force all graphical interface of RB off?