This one is intended. IHL has added a rubber tree sap (fluid) centrifuge recipe. Thus you don't need the electric evaporator at all.
Oh nice... Thats a good news...
Bad news is... i seem to not be able to start the server with 0.519 IHL. Client is working fine, but server is crashing on load with: http://pastebin.com/Lb2MT6sE Version 0.518 works fine
My guess is that its something to do with the new creative tab for IHL, maybe?