That post was not in response to your post (i.e. it is separate bug report)... The problem with the bundled ProX:AC97 is likely due to some other issue (as you say). As for the bundled plugins, I suspect that their registration info was added by other means (i.e. part of the kX installation script rather than using normal plugin registration methods), but I suppose it is possible that kX uses a different method of registration if it detects both versions of a plugin.