Thanks for the suggestion. I actually was trying the_tags without success, which is why I thought the problem was my modified loop.
As it turns out the loop was the problem, instances of wp_start must be replaced with the_post.
I am having this same problem, and I also reinstalled my theme, and it still doesn’t work. Does anyone know anything about this?
I am getting this same error and I’m also running the newest release, did you ever get it fixed?