Mistakes abound everywhere in movies, TV, books, etc.
If we collected every spelling mistake, plot inconsistency, editing mistake, and logical flaw, it would probably fill a library. Instead, Slipups in this archive are meant to be only accidental mistakes, with no plausible explanation, that others can verify, but not so trivial as to be nit-picking. If so, it's not a Slipup. For example, a scene of someone who just fell in the water, but are suddenly completely dry IS a Slipup. However, if there is a time lapse of any significant duration between the scenes, you could invent all sorts of plausible explanations of how they became dry again, and it would NOT be a Slipup.