First time this happened was when I went back to Goodsprings to talk to the doctor about getting healed. Surgery was done, he started walking away (which was unexpected), and went into the next room. Once the 'cutscene' had ended (and I could move around again), the doctor suddenly whips out his pistol in the next room, fires off two shots and screams "Aha! There you are!", and then re-holsters his weapon.
O-kaaay. Weird, but nothing completely unusual, I guess.
So then I wander over to NCRCF, for kicks and giggles. Start talking to the convict who runs their store, decide he doesn't have any wares I like, and exit his shop. Suddenly he, and by extension, the rest of the freaking room, suddenly whip out their guns/lead pipes/whatever and start beating the living crap out of my eyebot. Still friendly with me, but not my eyebot. I exit the room, and they *follow* me (or rather, my eyebot, I am still neutral to them). Go back in the room, they again follow, keep beating the crap out of my little friend. I exit the room once more and fast travel away (which I can do because, guess what? They aren't hostile towards me!).
Something weird is going on here. I would expect them to hate both me and my companion. But just the robot? That can't be right, and it definitely can't be right that friendly factions just start freaking out and attacking my pals for no good reason.