The "User report" plugin doesn't work

Problems with this plugin:

- You cannot select "All users" from the network administration blog (http://cl.ly/image/3l0R131X0j1S). Only work we you are inside a blog. (!)
- The Date filter does not work (http://cl.ly/image/3V150l1b3903)
- Different results we you create a report from different dashboards (http://cl.ly/image/1J2530071Y01 , compare with the previous screenshots)
- The PDF & CSV Button doesn't work, it shows you a white page