Rebecka,

I also began at 67%. Funny. What I did for the img tags was open the file in notepad, hit ctrl + f and type in img. At the end of each img tag there is a alt="". Just put something like your business name or a 1-2 word description in between the quotes. Then upload the page and run the diagnostic again. It will tell you if you missed any. Be careful not to delete the quotes or the tag won't work and the diagnostic will say it still needs alt tags.

The one I can't figure out what to do with is the H1 thing. All of my headings and stuff are setup in my style sheet so I can't just go adding headings in the middle of my page. Any suggestions?