I can't find any place that seems proper so I'm posting here.

All the problems appear to involve Compatibility View.

I can't open some (all?) Forums if I have Compatibility View selected.
I can't see the formatting icons (bold, italics and none of the others at the top) if I have Compatibility View selected.

The Enter key won't work if Compatibility View is NOT selected.

And the Chat area at the top flat doesn't work.

What's am I doing wrong?