[crarko adds: OK, Apple that's kind of crazy. Holding down the Option key with the Go menu selected causes 'Library' to appear in the list. Releasing it causes it to vanish. The Library folder is the only item that has this behavior.
By the way, before submitting any more hints about ~/Library be advised that Macworld is going to publish an article with 18 different ways to view this folder. I presume the two hints published today will be among them.]

