Reported by a user using Cauldron for SMP. No currently-known pattern.

Both formed correctly.

The confusing part is they were both functioning, except the GUI for the reactor hadn't updated to show the active-cooled GUI and the turbine GUI did not show any values except for power output.

Hi EBeef!

Here are two debug outputs:

Reactor: http://pastebin.com/Vf1arvA4

Turbine: http://pastebin.com/bL9CAfQi

Looks like client-side doesn't like the Manyullyn blocks in the reactor and turbine? Server-side says all is well and good though.

That is very interesting. Would you mind trying both with pure vanilla blocks and seeing what happens? Gold or iron or diamond.

Well, the weirdness is to be expected when the client-side machine hasn't assembled itself. The system isn't designed to accommodate that case. However, since replacing it with vanilla blocks works, it means there's something wrong with the registry system I wrote - and I'm pretty sure I know what it is.

The problem is most likely to be with different blocks being registered with multiple or different ore names. The ordering of ore names is not guaranteed between modpacks, and this also explains why some modpacks only have turbines failing to assemble, while other modpacks have only reactors failing to assemble.

Also, I'm going to close this, as it's now a confirmed duplicate of #292.