Same problem here, Chuck...was working fine before and now isn't on TWO
vB/Photopost sites that I upgraded last night from 6.1 to 6.11. If you click on the Post a Comment link up in the row with the icons, you go to a different page and can post a comment so it isn't permissions...it's just not loading the editor section of the page. You can see it here:
Main Index - Get Digi With It! Gallery
If you'd like a test account, let me know and I'll set one up. I'm going to go reupload some of the files I replaced during the upgrade and see if I can find out what the culprit is (but I'll do it on the other site so you can see this one and look at the code).