Since there isn't any thread (to my knowledge) that lists patch notes as they happen, I figured I'd start one.

Return to Eclipse Patch:

Added one of the most iconic maps of NS1 for the HL1 Engine into the current release of Natural Selection 2, "Eclipse."

The true patch notes, beyond a new map, are as follows:

Fixed players sometimes being stuck in command station at round start
Fixed Infestation blobs blocking commander view
Server Browser now highlights player count yellow if the server is semi-full due to reserved slots.
Removed texture streaming option from main menu since it wasn’t doing anything
Fixed all structures being outlined blue when on overhead mode as spectator
Fixed projectiles colliding with invisible movement collision group
Fixed ECHO_HARVESTER tooltip missing when echoing an Harvester
Fixed accidental use of voice order keys while ESC menu is open
Fixed bug where marine buy menu did not close when player was Stomped
Fixed Stab not having a custom icon
Fixed round start music not playing due to incorrect path
Fixed WhipBomb showing killed with BileBomb in console
Fixed loading screens using the wrong art sometimes
Fixed commander bindings reverting to default if a player joins a server before opening the options menu

Added new map: Eclipse
Added new main menu background
Added egg counter for Alien Commander in the top of the commander interface
Added Hive skill and level stats under name in main menu
Added support for new structures in ScenarioHandler. Added one other check path that works.
Added link to forums by clicking logo
Added remixed NS1/NS2 main menu theme

Ammo packs now refill all weapons instead of only the active one

Limit hit effect messages to 100 per second
Correctly limit max resources network field to 100 per player
Reduced network traffic generated by static structures
Implemented extra precaching to reduce incidence of hitching at the start of rounds
Optimized network traffic produced by Insight spectator system
Minor optimizations for skulk movement (optimized wall traces and removed predict wall walking)

Insight spectator system now outlines players in overhead view by default
Replaced “request enzyme” with “request drifter” in the Alien ‘commo-rose’
Servers with cheats enabled no longer send data to the Hive stat tracking system

Revert auto-generation of overviews by Builder due to Overview.exe crashes
Fixed crash in editor related to file type properties
Allow mappers to define custom round start music in ns2_gamerules entity
Added console command playmusic. Usage: sound/NS2.fev/pathtosound

Refinery (Thanks SamusDroid)
Fixed pathing in Lava Falls
Fixed some textures and gaps
Fixed some stuck spots
Adjusted some death trigger scales