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Personally, I don't use bugs that have been fixed in HD+. However, many AI features in Heroes can be considered bugs, such as the invisibility behind a firewall. But using them adds excitement to the battles, so I came to the conclusion stated at the beginning of the message. Moreover, most maps don't require the use of unfixed bugs from HD, but there are exceptions. And individual players can, of course, play by their own rules; there aren't really any strict standards here, as there are in online play.