Client
- Fixed fires creating too many light sources (should be a major performance improvement on low-end machines in particular)
- Fires emit fewer particles when Light Quality is set to Low
- Fixed some text issues/typos in tutorials
- Fixed a bug that could cause the game client to crash in certain terrain collision situations on Linux
- Fixed a bug that caused broken UI when accepting a match invitation while already in a pregame lobby
- Fixed a bug that could cause balloon decals to appear “deflated” on respawn
- Fixed a shader bug that caused decals to sometimes be visible through clouds
- Fixed a shader bug that caused the Royal theme to sometimes be visible through clouds
- Fixed a shader bug that could cause nearby clouds to fade away when viewed through the Spyglass (or high-zoom guns)
- Shadow options are no longer reset by entering the ship preview screen in any of its forms (customizer, store, lobby preview)
- Fixed a bug that could cause the Sandbox command UI to appear instead of the game type’s UI

Lobby
- Fixed: crew formation considering almost all matches ineligible (and either not showing them or creating a new one, depending on if you pressed Match List or Quick Join)
- Fixed: crew formations showing up in the match list
- Fixed a bug that allowed non-novice loadouts to be used in novice matches
- Fixed some bugs with clans and persistence that could cause lost data

Server Stability
- Practice and Tutorial matches now start in a selected server region, defaulting to the one with lowest ping (formerly they always started on US servers)
- Fixes to several cases where servers might not create or clean up matches correctly (contributing to general load issues)

Networking
- Fixed a networking prioritization issue that could cause certain messages (notably hit events and "snap character to position" events) to be lost or delayed for long periods of time.
- Fixed a networking bug that could cause all position updates to be lost for several seconds at a time under loaded network conditions
- A number of small improvements to networking stability and bandwidth usage
- Fixed a networking bug that could cause significant traffic spikes for a period of time after respawning

The networking fixes in particular should cover a number of strange bugs: "lag spikes", "missing hit markers", "falling through ship/map", "ships freezing and then catching up", etc. While we can't guarantee perfect results in the face of the vagaries of the Internet, it should be greatly improved over the original 1.3.6.