I read the Hobbit and the Lord of the Rings trilogy many times, and managed to see the name Grandalf instead of Gandalf every single time.
I was looking up a quote from a former Intel CEO just tonight and found out that his name wasn't Paul Ortelli, but Paul Otellini.
I insert letters that are not there, remove letters that are, and reorder whatever is left all the time.
Yet somehow, I'm also a speed reader.