This isn't actually a bug in your pack, but in the latest release, you have some lines in the 2DA's that have placeholder of "xtc" in some fields on as yet unfinished classes and feats.
These cause the character editor by ScripterRon (http://nwvault.ign.com/View.php?view=NWN2Tools.Detail&id=35) to crash upon opening due to the fields containing text rather than numbers.
Personally I find that tool invaluable for remaking companions to my own specifications, and undoing mistakes, and no doubt plenty of others also use it. In addition to this, I suspect that there may be other community-created tools that would exhibit similar behaviour.
Like I said, its not actually a bug, and its also reasonably easy to fix by simply removing the lines containing the placeholders from the 2DA's, give then fact that those lines don't actually do anything yet, but if its not any trouble, it may be a good idea to either remove placeholder lines from the released versions of the 2DA's, or use a number based placeholder on fields that are expected to be a number (although I suspect this would be more trouble than it's worth, as a number is nowhere near as easy to spot when scanning through a file, and of course its very unlikely to be unique.
I have also pointed this problem out to the maker of the character editor, as in that case it *is* actually a bug, however its probably still worth doing in case there are other tools that have the same problem.
Its really just a suggestion that would make life easier for some people, although probably not worth doing if it would entail more work for yourself.
I do love your pack, and by all means, keep up the great work!