Problems with bind.4.8.3

we have discovered a problem with our bind.4.8.3. It does not correctly handel records of type TXT for zones where our DNS is a secondary for. What version of bind is the current production version and where can the source or patches be obtained from? What versions do you use? I have heard of the alpha and beta tests of a new version of bind, but I'd rather prefer, as I said, a production version. Willi Huber