Compiling code from the Statechart tutorial on linux x86 with gcc 4.0.1 with the -Wextra flag results in the following warning: /usr/local/boost/1.34.0/x86/include/boost-1_34/boost/statechart/detail/counted_base.hpp: In copy constructor ‘boost::statechart::detail::counted_base<NeedsLocking>::counted_base(const boost::statechart::detail::counted_base<NeedsLocking>&) [with bool NeedsLocking = true]’:/usr/local/boost/1.34.0/x86/include/boost-1_34/boost/statechart/detail/rtti_policy.hpp:95: instantiated from here /usr/local/boost/1.34.0/x86/include/boost-1_34/boost/statechart/detail/counted_base.hpp:64: warning: base class ‘struct boost::statechart::detail::count_base<true>’ should be explicitly initialized in the copy constructor I've attached a patch to fix this. If a developer can pick this up, that would be great. Euan __________________________________________________________ Sent from Yahoo! Mail - a smarter inbox http://uk.mail.yahoo.com