From snapshot 379:
Allow disabling the automatic update check at startup
Make ambient heat drag effects weaker
Draw air velocity line near cursor when air velocity mode and debug HUD are on
Fix ptsave: being handled before autorun.lua
Fix some cases of bogus missing element warnings
Give visual indication of vote/fav requests being in progress
From snapshot 378:
Reaction bounds fixing for EMP and VIBR
FIRE from HYGN+OXYG now creates WTRV, not DSTW
STOR can absorb radiation particles
Make BGLA PROP_DEADLY
Fix NUM_PARTS being wrong almost all the time
Add credits UI (accessible from options menu)
Fix scroll areas sometimes scrolling when clicking them
Fix large save uploads failing (especially on Windows)
SRT (Separate Render Thread) is now enabled by default
Improve SRT performance when there's a low amount of particles
Fix frequent frame drops when using drawCap
drawCap is now enabled by default, and caps at your monitor's current refresh rate
Add DEBUG_SIMHUD and DEBUG_RENHUD Lua constants for debugging fpsCap and drawCap limits
Fix gravity wall being intermittently broken when drawn while paused
Add option to redirect standard output and standard error to log files
Make SRT work with event.AFTERSIMDRAW
Fix occasional crash involving overflowing menu sections
Fix photons sometimes being created with weird colors
Fix crash on exit while there are Lua components visible
Ensure that particle lifetime callbacks are always called
Fix some particles flickering when SRT is enabled
Fix missing elements in some older saves not showing up as such
From snapshot 374:
Add Select callback to Lua tools
Fix crash when a Lua tool Perform callback throws an error
Fix crash on exit while there are Lua windows visible
Fix EMP radius when damaging things around SPRK
CRMC low pressure - preserve .temp when breaking
Don't complain about missing elements that aren't actually used
Make global quit shortcut optional
Fix crashes when giving !set invalid property values
Only dispatch the gravity thread if there is work to be done and stop copying its input every frame
Fix gravity staying broken when pasted over by unrelated data
Fix crash when using invalid particle/element property values
Make properties and callbacks of non-custom tools read-only
Fix unnatural stacking near powers of 2 positions
Fix crash when navigating away from a save while voting on it
...
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here.