I know this was asked before, but I can't remember where and can't seem to find it.
Tom,
When you type your reply there are two rows of buttons above the insert image drop down, use the one on the bottom row second from the right, hover your mouse over it and it will say insert quote, click to use
hope this helps Colin
I hit the button and I guess I have to wait until I post this to see if it worked.
Tom.
update: I couldn't get it to work with the toolbar, but it worked with the insert quote command on the posts (I don't know how I haven't noticed that before) - thanks guys.
OK, why is my reply shaded in now?