One particular flaw I take a massive issue with is his "Scale of Belief" which puts agnostics directly between atheists and theists. For a man who holds Darwin in such high regard, you would have thought he might have actually read up on the philosophy that was created and popularized by "Darwin's Bulldog", Thomas Huxley. Dawkins doesn't even use the more common misconception of agnosticism (I don't know what I believe), but rather invents his own: "God’s existence and non-existence are exactly equiprobable".
It annoyed me so much that a couple of years ago, Ryft and I created a competing scale: http://atheistforums.org/thread-3817.html
It annoyed me so much that a couple of years ago, Ryft and I created a competing scale: http://atheistforums.org/thread-3817.html