Quick hack to discard twitter broadcast queue items on failure *IF* config option 'twitter' 'ignore_errors' is on:

$config['twitter']['ignore_errors'] = true;

A longer-term solution is to patch up the indirect retry handling to count retries better, or delay for later retry sensibly.

plugins/TwitterBridge/twitterqueuehandler.php

@@ -30,6 +30,7 @@ class TwitterQueueHandler extends QueueHandler
 
     function handle($notice)
     {
-        return broadcast_twitter($notice);
+        $ok = broadcast_twitter($notice);
+        return $ok || common_config('twitter', 'ignore_errors');
     }
 }