The correct way to report RuneScape bugs now is to use the 'Bug reporting' section of the Customer Support menu (accessible via the Secure Menu). Here you can select the type of bug you are reporting and complete a form which will give our testers all the information they need to investigate the problem.
Within the Bug reporting section you will also be able to view the list of currently known bugs and their current status. You should check this list before sending in a bug report to make sure it's not an issue we are already aware of.
We have removed the bug forums on the RuneScape Forums and the bug categories within the Feedback section of Customer Support, as these are no longer needed.
Hopefully you won't need to use this section of the website very often! If you do come across a bug though, please give as much detail as possible. The more information you provide, the quicker we can track down and fix the problems.