I ran into a compiler problem using the singleton library from the vault. singleton's constructor and destructor use instance_proxy before it is defined. The trivial fix is to make the definition of the constructor and destructor inline function at the bottom of the file (i.e. after instance_proxy is defined). singleton_manager.hpp causes warning under msvc 8.0 in the singleton_manager::cleanup function: warning C4706: assignment within conditional expression for while (!!(i = ptr_instance->ptr_first)) if this could be rewritten without much effort to silence the warning it would be nice. Nit - there seems to be a lot of extraneous inline keywords for functions defined inside the class definition. The library has proven quite useful. Thanks, Michael Marcin