I usually try to remember to give credit on the main items in my images but Im afraid the smaller stuff does get missed. I mean you could fill a page of minor credits with some of my pics. Unfairly its these little details that often make the pic. Miscrediting someone is embarrasing but surely not meant maliciously. Id bet Ive done it a couple of times. I also get embarrased when someone comments something like "congrats on the modelling" when Ive made it clear on the gallery post that someone else did it. I cant model a cube! I feel like writing to the modeller, apologising.