My liquiducts connected to my thermal generators glitched last night. Left clicking on them with the omniwrench crashed the server.

I just logged in a few minutes ago and find that left clicking them still crashes, but this time it was just me. It was repeatable with both the crescent wrench and omniwrench.

When they're glitched, they will appear disconnected and the graphics may be messed up.

Right-shift clicking on them pops them off and you can re-place them and they act normally again.