When I use special characters in a multi-configuration build, I always end up getting a 404 error.
I use user-defined axis with following values:

• https://www.djangoproject.com/download/1.7b3/tarball/
• Django>=1.5,<1.6
• Django>=1.6,<1.7
• Django # (This one works!)

the name is: django.
I can build the project with these configurations but when I go to the Project and select the configuration, I get a 404 error (see attachment, the second axis (Python), doesn't make a different).

I think the commas break the URL but I'm not sure. I can't change the name of the axis because the define the exaction version (for instance, `=>1.5,1.6` means that every version that is new that 1.5 but older than 1.6 is allowed (e.g 1.5, 1.5.1, ...)).