When I try to create jobs like

1. foo
2. FOO
3. Foo
4. fOo
5. ...
   Jenkins will only allow me to create the first one. After that, it complains that a job of this name already exists. (It uses the case of the job, I just try to create)
   [I'm mildly surprised, because this is Unix, where case matters]

The bad thing comes, when I try to download the job using
http://<jenkins>:<port>/view/Admin/view/All/job/FOO/config.xml
Here I can use whatever case for 'FOO' (e.g. all of the above) and each of the downloads succeed.
I would expect to only be able to download the job with the correct case. (Yielding an error in all other cases)