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When I put quotes (') in a checkin message, such as using contractions, the save fails for a bad command if I have matching quotes or an un-escaped string literal if I only have a single quote in the message field. Luckily for me I could just not use contractions but others may not be so lucky. I've only seen it for clearcase at the moment but since these screens are generic for all versioning programs I'm betting that it will happen for others as well.