Any contraction that uses an apostrophe has to be auto-corrected. Like the words: isnt dont hasnt, etc. Even when auto-corrected, if you start a sentence with them, the program properly capitalizes them if you don't do it, yet flags them as being spelled wrong, and you have to auto-correct them to the proper spelling, capitalized, which seems rather redundant, since you've already auto-corrected the lower-cased same word. Then, when you start a sentence with one of these corrected words, and don't put the apostrophe in, they are auto-corrected to have the apostrophe, but not capitalized, leaving a new sentence like this: isn't it hot out today?