ClusterFlutterer

On 25 October 2011 at 2:37 PM GMT, an update code-named ClusterFlutterer, also known as "Bot Nuking Day" was implemented aimed at preventing reflection and injection bots from functioning. Jagex believes that this consists of 98% of all bots seen in the game. Also, upon revealing ClusterFlutterer, Jagex stated that over 1.5 million bots had been recently banned. Due to the complex nature of the game update, the update was finished 2 hours and 37 minutes after the countdown timer reached 0, resulting in the game being offline for approximately 1 hour and 7 minutes while Jagex updated and tested their systems.

To celebrate, Jagex has created the following events: * indicates that the D&D will be reset on the day if already done for the week. Players can spy on all penguins on the day they reset (Wednesday), and then again on Thursday, which will give them double points. This will give them a maximum potential of 48 points in 2 days (16 on Wednesday and 32 on Thursday due to double points). This is two points below the maximum cap of 50.
 * Tuesday: Triple experience for training Slayer. (This effect did not stack with Dragon Slayer Gloves.) Along with that, specific monsters, such as Fire giants and Steel dragons, respawned at a much more faster rate (as if the world was full)
 * Wednesday: Triple tickets from Castle Wars.
 * Thursday: Bonus experience from certain Distractions and Diversions.
 * Penguin Hide & Seek: double points *
 * Evil Tree: triple experience
 * Shooting Star: triple experience and increased reward
 * Familiarisation: receive both charm and ingredients reward *
 * Friday: Triple zeal from Soul Wars

The aftermath
After the update, less than 100,000 players were visible online on the home page counter. Free-To-Play worlds were heavily depopulated. Numbers shown in the world select showed that around 78-100 players could be found on most worlds. During peak periods, several worlds reached over a total of 1000. The trading world, 2, was the only one to reach the player cap during that time. During off-peak periods, numerous Free-To-Play worlds had as few as 40 or less players on their servers. The same went with Pay-to-Play worlds during a specific time, reaching to less then 100 per world. Only world 1 was unaffected, as it is a popular trading world. This allows legitimate players to get resources without the interference of resource bots. The full effect of the update is not yet clear; however, prices of commonly botted items began to rise. Many heavily botted items started to dramatically increase in price even before the "nuke" was released.

Along with that, due to this update, specific monsters, such as Steel dragons respawned faster than before after the slayer event was over, to combat the low populations. (So if you killed a dragon you would have almost a few seconds to get the drops before it respawned).

At Runefest, it was revealed in a session with Mark Gerhard that 7.7 million accounts had been banned for gold farming between the Tuesday (25 October) update and the session on Saturday (29 October), and that another 4-5 million would be banned by the end by the end of Sunday (30 October), and that these banned accounts made up about 40% of the player base. Over nine thousand accounts a minute are being banned, and account creation and numbers of existing accounts from certain parts of the world (namely China and Korea) have been reduced by 99.9%, from hundreds of thousands of accounts a month, to as few as 963.

In the weeks following, many players will experience an extreme increase in lag, and a decrease in their FPS (Frames Per Second) rate. Some players have reportedly experienced a decrease in FPS of over 50%. It has been reported that frame rates using MID in OpenGL can go as low as 2 FPS.