$_POST responses infrequently dropped

Posted May 20, 2014 2.5k views
Simple Wordpress 1 click install with BBpress running. Sometimes when $_POSTs are made (with or without ajax) the response is dropped. This means that the message does actually hit the database and save, but sometimes you are not redirected (with ajax, there is simply no return signal). Are there any basics to check for? Any reasons this could be happening? It is on Ubuntu 13.10 and Apache

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Do a check on file size you are uploading and system max_size permission.