There are a lot of plugins and themes for WordPress that do not correctly load the jQuery and Facebook libraries.
Before assuming the plugin is broken and give negative reviews and comments I ask you send an email to further look into the problem.
Usually these types of issues are the root of the problem:
- People with cache plugins do not rebuild the cache after setting up the plugin.
- Multiple instances of jQuery being loaded due to poor coding standards in a plugin on your site. People who run a lot of plugins are usually in this boat.
- Plugins load / use jQuery with using noConflict mode. When you have multiple instances and code that does not use noConflict, one error can throw off any plugins and code that run after it.
- Missing settings, if you forget to set a required option the plugin can fail to run.
Facebook does not allow you to specify a callback function and instead uses event listeners to track the Like button so if you have multiple Like buttons on a page and one of those plugins does not correctly parse the data returned, it may break STP.