I develop custom Access databases for several clients. Four of my clients are now using Access 2007. Within the last few weeks, three of them have had the same problem. Suddenly, their database stops working. The reason -- all of the code was gone. All code-behind-forms was gone, and the the code modules were also gone (they showed up in the list of modules, but when you tried to open them, Access said they didn't exist).
Does anyone have a clue as to what's causing this?