Got the new and efficient japicompat to give me results today. The results weren't exactly right, but I went through all the differences compared to the output of the old code and found only one specific bug. I need to figure out why it thinks that java.security is missing entirely instead of just missing a few classes and methods. I suspect it's to do with the fact that the first class it encounters is one of the missing ones.
The rot13 screen hack did it's job for now. I'll be using it again... :)
fxn: I'm glad that emacs supports the feature already, but you can have my vim when you pry it from my cold dead fingers ;)
Documentation is the hardest job to do, especially when you're documenting a horrible mess of specific business rules and have to get it done in a short timespan...