[SOLVED] TinyMCE editor removes spaces after comma character

I am using theme Atahualpa 3.6.7 on http://barbandrodger.com. When I create a post (or page), the resulting code removes any space character that follows a comma. You can see this effect by going to http://barbandrodger.com. You'll see it on the home page.

I went back to Atahualpa 3.6.6. Same problem.

I went back to Atahualpa 3.6.4. Same problem.

When I create a new post, or edit an old one, and then do a preview, I see the same effect. Any word that has a following comma, together with a following space, is run up to the next word with no space in between.

Has anyone else experienced this? Any ideas?

Rodger