1. Memory usage has been reduced when using DirectX mode. This is achieved by no longer storing textures in RAM when they are already loaded on the GPU. A saving of around 33-40% can be achieved using this technique, but it could cause things to break, so please report any issues you have in Tech Support.
2. Memory leak fixed when many custom hitsounds are loaded over a long period of time.
3. Quick Join button added in the multiplayer lobby. Randomly selects a game which has free slots for those times you just want to get in and play.
4. New localisations have been added based on the osu! localisation project v2. Go help out if you would like to improve further - it's really easy to chip in!
5. Many, many bug fixes.

Improve right-click behaviour at song select, allowing right-clicking non-current beatmap to still display options.

Gamechamp wrote:

What does "Allow fun spoiling during spectator/replay" mean? We can destroy the fun of the people we spectate now? What button does that? xD

FurukawaPan wrote:

I normally used right click on the background to jump to other parts of my (rather lengthy) beatmap list. It seems now right clicking on background of beatmap screen is doing nothing. I hope this is a temporary glitch.

Quick Join button added in the multiplayer lobby. Randomly selects a game which has free slots for those times you just want to get in and play.

peppy wrote:

Memory leak fixed when many custom hitsounds are loaded over a long period of time.

peppy wrote:

FurukawaPan wrote:

I normally used right click on the background to jump to other parts of my (rather lengthy) beatmap list. It seems now right clicking on background of beatmap screen is doing nothing. I hope this is a temporary glitch.

Drag slightly after right clicking. This is not temporary.