Absolute paths fail with QueueJamfile
Any path with a colon in (e.g. C:/foo.jam) will fail when passed into QueueJamfile on Windows.
I presume this is because of the use of the colon as a priority separator.
(also, there's several places in the documentation where you've spelt QueueJamFile with a capital F, which makes it very confusing at first trying to figure out why it's not working when you try and call it) ;-)