This problem happen in my VPS after i install Alternative PHP cache (APC). And also i already have Zend optimizer installed on the same VPS. After i installed APC, my WordPress blog show strange behavior. Sometimes i got Error 500 Internal Server Error, and sometimes i got PHP fatal error.Here is the error messsage:As i try to find the solution on Google, there are lot of others complaining the same thing. You may need to read the details on faqs.org as it clearly state that APC … Read more...