at/on

Yoong Liat wrote:

Either preposition is correct. Hence, there is no difference in meaning between the sentences.

From 'both prepositions being correct' it does not follow that the two sentences are equal, even if they are.

http://www.englishforums.com/English/OnAtTheCorner/blmhh/Post.htm

Taka wrote:

OK. Then what about these below? Are they both acceptable? If not, why not? (3) I'll see you on the corner of the street. (4) I'll see you at the corner of the street.

corner (OF ROADS) --  a place where two streets join: There was a large group of youths standing on the street corner. (Oxford Advanced Learner's Dictionary)

Hence, I'll see you on the corner of the street is correct.

While the meanings are essentially identical, I believe there can be a very slight difference in emphasis between the two.  'At' can be used to refer more to the general location.  'On' is slightly more pinpoint and implies being directly on top of something.

"There was a car accident at the corner of 5th and James Street."  (The listener would probably assume the cars are still in the roadway.)

"There was a car accident on the corner of 5th and James Street."  (The listener would be more likely to imagine the accident occurred on the sidewalk where those streets intersect.)

Again, this is a very subtle difference, and you can often use the two prepositions pretty much interchangeably.  As you can see from some of the posts above, some will disagree with this distinction.