The biploar thing wasn't that nice, but may not have been far off the mark. I noticed that in his statement on Glenn's death, Henley buried the word "mercurial" among the complimentary adjectives. I don't think he meant to be insulting to Glenn, but rather to paint a realistic portrait of Glenn's personality, instead of stooping to the view that once someone has passed, the memories of them are perfect. The word does confirm, though, that Frey's moods were up and down.
Still, Felder could have used a less insulting word, as Henley chose to do. I don't think I've commented on this thread before, but I have commented on other threads that while Henley is my favorite Eagle, I love all the Eagles in varying degrees. The suggestion somewhere in this thread that if you're a Frey or Henley fan, you're necessarily biased toward hating Felder, bothers me. I'm sure there's some truth in Felder's book. I have no idea, and I probably will never know, how much truth. I do find his tone whiny at some points, and also feel that he takes backhanded swipes at people, including even Joe, sometimes. Even given all that, though, I would probably go to see him if he was appearing near me and the price was right. I have every respect for his awesome guitar work. He also has a nice voice, although nowhere near in the league of Don Henley's, and I'm glad the Eagles stuck to their guns on the lead vocal of VOL. I love the song and don't think the versions I've heard on YouTube with Felder's lead vocals even come close to Henley's.