Hi Luke, I'm wondering if you've had a chance to look at some boost::polygon bugs I've submitted, or if maybe the trac bug database is the wrong spot: https://svn.boost.org/trac/boost/ticket/5312 (wrong result from contains()) https://svn.boost.org/trac/boost/ticket/5358 (bad output from resize()) https://svn.boost.org/trac/boost/ticket/5359 (very slow resize()) All are, hopefully, reasonably high quality bugs with short, dependency-free code included to exercise them. All have been confirmed vs. the code in subversion. The last two (and in particular 5358) are blockers for me right now. What I'm doing fundamentally requires resize(), and so I'm stuck without a solution to at least one of them. Thanks for your help, and let me know if you need any more information. Andy