Hmm .. I found it, MSVC is picky/dumb and we have to specify the type, like in this case: http://stackoverflow.com/questions/708555/compile-error-c-could-not-deduce-template-argument-for-t
If someone with Windows just goes ahead and fixes that, we can continue enjoying great precision in our math support, otherwise I will try to fix it tomorrow and will wait for the buildbot to restart ;). Cheers, Pedro.