Since this is a beta, there are many things wrong with this version.

Quantum battery boxes don't crash the server/game anymore.
My linear particle accelerator hits 100%, doesn't produce antimatter, and starts up again.
My fusion reactor is outputting a bit more. 1.6MW compared to 1.49MW. Steam funnels can't be used to make a second tier of turbines.
MFFS Extractors seem to be a bit slower or require more energy to run at max speed.
I've ran at least 1000 cobblestone through my strange matter generators, but nothing yet... Maybe the requirements have changed? (We have an agreement on my server to run a strange matter generator 50 times (~1 kJ per run) before we spoof in one Strange Matter. I've never attempted strange matter on a server were it actually worked, does it use a cell from the particle accelerator?)
Disconnecting from the server causing the client to crash almost every time.
Hypersonic, Anti-gravity, Red-matter, EMP, and Sonic explosives crash the game. Has anyone tried forcing an older version of ICBM?
The potential fuses and circuit breakers have been removed. I'm quite bummed about that, had a lot of hope for being able to control my power lines a bit better.
The auto-feeder module on the power helmet no longer instantly eats all food in your inventory. It now eats for you as you get hungry.
The swim boost module seems to be a bit slower.
Night vision glitches off less often than before.
Wire textures have been reverted back to the way they were before 1.1.3. One can actually tell the type of wire by looking at it now.
BlastCraft is gone

Why'd we go to a beta version :/