<A target="_blank" href="http://flexdomino.blogspot.com/2011/03/fixed-lsxsdlss.html">Matthias Wille says if you have been impacted by the Base64 problems in LSXSD.LSS</A>, he has re-written the Base 64 methods to be reliable, if not quick. He's posted the code for you to use until IBM fixes the problem.