Fatal error: Call-time pass-by-reference has been removed in /..PATH.../wp-content/plugins/twitter-mentions-as-comments/twitter-mentions-as-comments.php on line 61
This is an incompatibility with PHP 5.4.x
Found and replaced the following instances in all plugin files to get it to activate. Appears to operate as intended. Good luck.
&$this replaced with $this
&$child replaced with $child
&$parent replaced with $parent