I noticed this when after accepting the v1.0.3 -> v1.0.4 upgrade. None of the TE pipes (fluiduct or leadstone conduit) connect to each other anymore, and it's not just a cosmetic bug, since there's no fluids or energy flowing.
I tested in a brand new world, created in v1.0.4 and pipes connect there OK. It's just my pre-existing world (which I really don't want to restart now) that's no longer functional.
I tested in a brand new world, created in v1.0.4 and pipes connect there OK. It's just my pre-existing world (which I really don't want to restart now) that's no longer functional.