OK, let me see if my usual method works. I understand the Photobucket problems as of late, and dangers of third party photo uploaders. Don't recommend them.
But anyhow, here's the method I always use:
Take a picture, or download a picture, JPG, and save to your computer.
Please, use a picture manager, whether Microsoft or other, and resize to large document. Saves us from tremendous scrolling.
Reply to a post, quote a post, or start a thread of your own. Not Quick Reply.
Use the Manage Attachments button at the bottom to search your computer, and upload the picture. Close that window, and submit reply. It's that easy. Let's see if it still works.
All the best,
WW