Flipping vertices in blender 2.3

I just started using blender 2.3 and I’m trying to figure out where things have been moved. In previous versions of blender if you wanted to flip an object or a set of vertices you just hit s then x and it flipped the opposite direction. It doesn’t seem to be doing that with the new version. Is that a bug or is the flip vertices now under a new set of hotkeys?

Never mind. Funny what happens when you actually do a little reading:)