Standard, I most certainly appreciate you input, and don't think you're a nasty wasty criticizer. I'm glad to have your input as a user of both full frames and the 24.
Viggo and Etienne, good to know that you two have both had similar experiences, and interesting to note that you, Etienne, noticed the problem on the 5D II.
I'm pretty frustrated with the whole experience really, because no other lens in the canon line (other than the TS 24, which isn't what I'm looking for) can do what this lens can do, and that just so happens to be what I WANT it to do. I'd like to get a 16-35, but the lack of the 1.4 aperture is what keeps me from doing so. I wonder if I should just try to acquire another copy, or if I should just abandon the idea of this wonderful lens altogether? What a sad thought that is...
Does anyone know if I were to send this lens back to Canon if they could fix the problem or replace it? My date code seems to indicate that the lens was produced in September of 2010, so by that I would imagine it's out of warranty, though I still have the warranty card... How could Canon be aware of this problem and not do a recall, or issue a new version of the lens? Seems a little silly. Every single site I go on seems to have reviews that reflect this problem....
If that particular lens is really important to you, why not try another one?
I may try again now that I am using 5DIII, it's just that I'm a bit gun shy at the high price and the time it takes to evaluate and trade until you get what you want. I'm using the 16-35L 2.8 II now.