» Thu Jul 29, 2010 9:03 pm
Same issue here. I think I lost him around when I went to the BoS safehouse. That's kind of a guess on my part as it happened several days ago and I may not have noticed him missing at first, and he certainly isn't there now. Doesn't show up on my map and the game was on hardcoe mode for a loooong time after he went missing but he apparently never managed to get himself killed, so he's still "my companion." I know this because when I tried to hire Rex it says I still have a robotic companion. Additionally, people make comments about ED-E as if he's following me. Tried the Vault 22 elevator trick, tried waiting 3 days and checking Primm, etc., nothing works. I think you just have to give him up as a lost cause basically.
Thankfully, even though he's still "following" you, he will *not* prevent you from entering places like the Lucky 38 and Caesar's tent since he isn't physically near you. Other followers who are following you and physically close by will prevent you, but lost ED-E won't. This is very good, for obvious reasons.