PHP non-bug causes loss of millions (in farmville coins)
bugs.php.net
bugs.php.net
Once they are fed up with bug trackers, they will probably move on and start contributing troll code to open source projects.
Occasionally, I wouldn't even get the error message; the report would be something like "Hey Mike, listen, I ran the regression tests against your new patch and they fail. Please fix it, I told the project head the stable API would be ready ASAP. Thank you."