It was indeed a compatibility problem with Industrial Revolution. That mod does a pass over each icon in the game and replaces them with new versions (which is to be expected given the amount of new sprites the mod adds) and this was giving compatiblity issues with the icons i've added for upgraded roboports.
Anyway it was an easy fix after all. I've managed to get rid of a couple glitches too and I've tested major functionality of BetterBots with Industrial Revolution. Everything seemed to work fine, but of course there may be still incompatibilities hidden somewhere (IR is such a big mod afterall). Be sure to report anything that you find and I'll try to fix it as soon as I can.
The new version has been pushed.
