I, myself, own a very small ORPG, and update every week or so. I get at least 34 bug reports in the first hour of the update. I've never released a bug-free update. And I have a few testers in the staff that give me feedback and bug reports on every update before it's released. JagEx is actually doing relatively well. And for those that say "Well, these bugs are blatantly obvious. JagEx apparently did no testing on this.".. Frequently, the worst bugs are impossible for a testing team to find. They are normally linked to glitches during the uploading of the update to the server, or the server load. Something that works bug-free for 4 people rarely works bug-free for 150,000 people. ' Construction is a very, very complex skill code-wise from what I can tell. Certain systems in games just cough up a horde of game-breaking bugs even if you change a line or two.