Hi all, This is my first post, so please let me know if I am doing anything wrong. I am having trouble using the new iostream headers in Boost 3.3. I cannot get simple Sinks to function correctly. Take the following code for example: Courier 7676,0F0F,5050namespace bio = boost::iostreams; 7676,0F0F,5050int main() { 7676,0F0F,5050typedef bio::stream< nullsink; nullsink out; out <<<< 8989,1313,1515"Ignore me"; } This code always results in a runtime assertion failure: /usr/local/include/boost/iostreams/detail/optional.hpp:54: failed assertion `initialized_' What am I doing wrong? Any help would be greatly appreciated. Cheers, Marius