Hi Barry
Sorry Scott, don't mean to step on your toes or confuse things. Something in your description doesn't seem right there Barry, too early in the day for me to work out what though.
I've tried this way out, here and on my blog page, and it works .
Take the url from the page
then paste that as usual, taking the 's' out, add the size you want
insert, it should then look something like this
and then, when you change to preview should be there.
POST
Hope maybe that's helped,
Cheers
Rich.