Dear Signals2 developers, I get an unused variable warning from my compiler (g++ 4.5.1, with flags "-Wall -Wextra -ansi -pedantic") at lines 510 and 515 of file "boost/signals2/detail/signal_template.hpp". The warning is issued for the parameter "is_group" which is not used any more. Please, could you fix it? Possible solutions: a) Add a comment around the parameter name: void do_disconnect(const group_type &group, mpl::bool_<true> /*is_group*/) ... template<typename T> void do_disconnect(const T &slot, mpl::bool_<false> /*is_group*/) b) Add a void statement: void do_disconnect(const group_type &group, mpl::bool_<true> is_group) { (void)is_group; } template<typename T> void do_disconnect(const T &slot, mpl::bool_<false> is_group) { (void)is_group; ... } Thank you very much in advance!! Best, -- Marco