I have a blog that is work in progress. I have the plugin - Like set to include the blog category and the View Setting is set to "Both".
On this article: pueloconsulting.com/blog/34-why-i-dont-like-free-joomla-extensions
there is a black overlay covering the mainbody. The same behavior comes from setting it to "Bottom". Only "none" or "Top" solves the issue. See attached screenshot.
On this article: pueloconsulting.com/blog/33-jreviews-with-amazon-s3-and-cloudfront-cdn
I had the same problem the first 25 page hits or so and then it went away and I didn't see this problem again until I published article ID 34 and saw it there.
I have cleared all caches and turned off the CDN but it didn't help. Only putting the buttons at the top or turning them off solves it.
JFBConnect 5.0.0
Vital Data:
PHP Built On Linux serv01.my.server.com 2.6.18-194.32.1.el5PAE #1 SMP Wed Jan 5 18:43:13 EST 2011 i686
Database Version 5.0.95-community-log
Database Collation utf8_general_ci
PHP Version 5.3.22
Web Server Apache/2.2.23 (Unix) mod_ssl/2.2.23 OpenSSL/0.9.8e-fips-rhel5 mod_bwlimited/1.4
WebServer to PHP Interface cgi-fcgi
Joomla! Version Joomla! 2.5.9 Stable [ Ember ] 4-February-2013 14:00 GMT
Joomla! Platform Version Joomla Platform 11.4.0 Stable [ Brian Kernighan ] 03-Jan-2012 00:00 GMT
User Agent Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:19.0) Gecko/20100101 Firefox/19.0