new centre of rotation/scale: the cursor! (d'oh!)

I seem to have done something to Blender 2.30 that I never did with 2.25 and didn’t even know was possible: I changed the centre of rotation to be the cursor!
unfortunately, I’d rather have objects rotate about their own centres, as I can never place the cursor in the same spot twice. I don’t know how I managed to do this, and it seems to be now stuck as my user default (after I made some other changes) Anyone know how to turn off his (sometimes) useful feature?

never mind… problem solved
…man i need some SLEEEEEEEEEEEEEP