I'm going to join Queen Mother and play my age card....
When I went to school, the letter "W" was also a possible vowel (along with the sometimes "Y" rule). Reading this thread, I worried my memory might be failing me, so I found the explanation/proof of my declaration at the following link. Have at it!
http://www.englishforums.com/English.../mpqq/post.htm
PS Scroll to the bottom for the post by CalifJim