I’ve just noticed it, sorry. The “e” on the plugin’s homepage kinda looks like a “B”.
Strangely, wordpress didn’t notify me of the update.
NOT resolved!!! I receive the same error message on WP 3.1 with version 2.0b of the plugin.
Sorry, I forgot to refresh the page and I haven’t seen that an answer was already given.
I think I fixed the problem. I deactivated all the plugins, and the problem went away. Then, I started reactivating them one by one, verifying that i could still edit html on a test-post. When i activated “Use Google Libraries” the problem came back.
Same problem here. I am also unable to edit or post any new article.