New Post: Facebook box disappeared

Wow, I don't even see those packages.

OK. I might have led you in a wrong direction. Sorry.
You probably don't have those packages installed.

Just to finally make sure that you haven't those packages installed, could you just check on your website the following?

1. In the System perspective, expand /App_Data/Composite/Packages/
2. and check for the folders with these GUIDs:
3. 48493797-75c7-43d6-97ad-e097dc5f21f3
4. 68806560-fd02-4d2d-895f-9cea1df5c190
   
5. And also see if there are any files in those folders if they exist.
   

If the packages are not installed, my guess is that in your template (Master Pages, if I can assume from the screenshot) or directly on the pages you have functionality for, say, a slider, and Facebook Like Box - or anything that uses jQuery of two different versions.

When I look the source of your front page I can see these:

<script type="text/javascript" language="JavaScript" src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.5.min.js"></script>

and

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>

Looks to me like calling two different versions of jQuery on the same page. My best guess is that this might account for your trouble.

And if these two elements end up on the page not because of the above mentioned packages or similar old-version C1 packages that use jQuery,
then I can only suggest that you dig into where these two jQuery's come from and try and avoid this, and see if it helps.

Here I make a lot of assumptions so I am not sure if this could be of any help to you at this point.