Questions to new version 5.0

Hi guys,

I have a couple of questions regarding the new easyblog version 5.

1. I deactivated rss feed since I am using feedburner. But even so I deactivated the integrated rss functionality it is showing a subscribe to rss in the left side bar on http://www.userability.de. Is there another setting I would need to deactivate subscriptions for categories or authors? => right now it is linking to 404
2. If I enable rss feed in the easy blog backend I am getting the error message in the frontend

Fatal error: Call to undefined method JDocumentFeed::addCustomTag() in /homepages/36/d195417764/htdocs/userability/plugins/content/seoglossary/seoglossary.php on line 252

3. On my entry page below the avatar icon there is an icon for the post type (Saying "standard post" by mouseover). I enabled that in the backend (or at least I thought I've enabled it) but it is still displayed. Can you advice how to remove it?
4. With the new layout I've chosen the related articles are coming with an image. Where do I maintain that image since there is no form field for "blog image" avialable anymore in the backend (if I recall correct there was such a field in the latest version).
5. When I save a blog post it is telling me

JSON.parse: unexpected character at line 1 column 2 of the JSON data

=> it doesn't look like it is doing any harm in the frontend but not sure what it is about to tell me.
6. I am not sure if the mistake is on my end or part of the design but when I hit http://www.userability.de/entry/web-usability/wie-hamburg-wasser-portokosten-haette-sparen-koennen#comments there is no comment form available even if I am certain that I enabled everything in the backend... furthermore for this post I already had one comment.

Thanks in advance. I really appriciate your support and the quick responses to my questions. You are doing a great job.

Best Nick