I have Better WP Security, W3 Total Cache and Add Link to Facebook on my site. Up until February 2013 these plugins got along just fine (for almost 2 years).
As the plugin Add Link To Facebook is affected I contacted the developer of this plugin first. Here's the conversation:
I found out this plugin was not working since Feb. I had removed user id=1 around that time and assumed that was the issue, so I updated the plugin as instructed. Was able to finally get the plugin authorized (see below) however it appears that the Add Link to Facebook will not post to my wall with 2 specific plugins activated:
1) it would not authorize when the plugins ‘Better WP Security’ and ‘W3 Total Cache’ were activated. I’d go through the FB questions and it would appear to get stuck and sit on a blank page. I got it to work when I deactivated both these plugins; then it authorized fast and easy.
2) My posts do not show up on the Facebook page when I have these same plugins activated. I have to deactivate both these plugins for a post to show up on Facebook.
In both instances, I tried with one vs. the other but it appears that it needs to be both deactivated for a post to work.
Thoughts, suggestions to fix this issue?
(I do have the FB dev app set to the July settings if that makes any difference)
From my experience there is a bigger chance that there is a problem in one of the other plugins than in Add Link to Facebook, so first seek help for the other plugins. I have waste my time too many times into looking into problems caused by other plugins. Nine out of time times it is not a problem in Add Link to Facebook and the problem could not be fixed in Add Link to Facebook too.
Any thoughts? Is this a WP Security issue? Also posting on W3 Total Cache support page.