Possible Duplicate:
Use of “a” versus “an”
“A” becomes “an” before a word beginning with a vowel, does this apply to “u”?
Is it “a uniform” or “an uniform”?
Which is correct — “A Year” or “An Year”?
I noticed an ad on Stack Overflow featuring another StackExchange site and the title of the question had this in it:
Allow an user to...
But shouldn't it be
Allow a user to...
Am I wrong or is this just one of those exceptions?