Oh this is odd..
The failed photo insertion was a right click, copy image address, paste to the post using the photo button, failed from my Vista desktop
But the mine photos that worked were rt click on photo....etc...and worked, both from Google Photos but from laptop Win 7
AND on the desktop, from Picasa, clicking on web albums you have to login to GP even tho the desktop is already logged into GP.....but on the laptop clicking on web album brings you right to GP "archived albums"
Geeeze, such fun