Because the basename of the file that generates this page is is "aux" (the fullname is "./aux.md"), Fossil cannot check out on Windows. An error message results:

Unable to open file "aux.md" for writing

To try this, first clone this repository:

fossil clone http://www.fossil-scm.org/aux-test aux-test.fossil

Then try to open the resulting repository on Windows:

fossil open aux-test.fossil

Does anybody know of a work-around?