Its a bug. See the post by lurker_hlb3 on this page:
http://www.subsim.com/radioroom/show...123467&page=48
He is aware of the problem and is working on a fix for RSRDC. I don't know if the RFB team is aware of it happenng, so you might want to post in their mod forum thread. Those guys do some amazing work to produce the Mods in the first place and they are quick to solve the problems we find