Hi Robert, I just tried compiling our app with Boost 1.35 on Visual Studio 7.1. I got a lot of errors (ambiguous symbols, conflicts between Boost and other 3rd party headers). The problem seems to be that the header text_iarchive.hpp (but none of the >40 other boost headers that I'm using) puts the content of namespace boost at global scope. Here is a simple example that reproduces the problem ----------------------------------- // Expected behavior: Should not compile // Observed behavior with Boost 1.34.1 and MSVC 7.1: Does not compile // Observed behavior with Boost 1.35 and MSVC 7.1: Does compile #include <boost/shared_ptr.hpp> #include <boost/archive/text_iarchive.hpp> shared_ptr<int> sp; ------------------------------------- --Johan Råde