Simple Trackback Validation PHP Errors Broke on v3.0

This version of the plugin is known broke by many people and was patched by users nearly three years ago. The plugin has not been updated in 3 years. The patch is here: http://ocaoimh.ie/2008/04/03/slow-down-trackback-spam-with-simple-trackback-validation/ The “Simple Trackback Validation with Topsy Blocker” is a newer port and regularly maintained and very likely patched. This plugin appears to be unsupported at this time.
Kimberly