Another thing I would recommend is setting yourself up with a debugging log. Have it log the last few (or all) of its requests and the results it gets back from the server. The next time your script misbehaves, take a look at this log to see what it's acting upon. If you want to put 'markers' or 'checkpoints' in various places in and around your loops, so that information is logged as your program reaches various points of execution, this would also let you trace the flow of execution, though if your script is entering an infinite loop (which I suspect it is), this log file will fill up fast.