Worse than subtle formatting changes was some kind of corruption that could slowly swallow bits of your document without you noticing. Sometimes going back befo

Worse than subtle formatting changes was some kind of corruption that could slowly swallow bits of your document without you noticing. Sometimes going back before the corruption had visible effects was not good enough to stop it from manifesting again. I remember back in school religiously saving new versions of Word documents so that if the newest version went bad I could start a fresh doc, then copy and paste sections from old versions via Notepad to cleanse the corruption. (Direct Word-to-Word could bring it across — I guess that tells us something about how they implemented copy+paste between documents, too!)