I've been using this for some serious scraping recently... dozens of threads scraping for 5, 6 days at a time. Very good application, but watch out for memory

I've been using this for some serious scraping recently... dozens of threads scraping for 5, 6 days at a time. Very good application, but watch out for memory leaks. Leaks like a sieve when you miss a ->clear() call in your destructors if you're not using the circular reference detection feature in the 5.3 garbage collector.