I have an odd problem with User Role Editor.
I have added a few groups to use them with Peter's login redirect to make users of group A go to a certain page after login and users of group B go to a different page after login.
This works fine so far. But then I had a problem with one group and wanted to delete it. When I went into the Admin of User Role Editor, in the dialog for "Delete Role" there was only one of my five roles in the dropdown. So I was not able to delete the role I had a problem with.
I hope I could make clear what my problem is.
I have added group A, group B, group C and group D and wanted to delete group C but in the "Delete role" - dropdown there was only group A ... so I can't delete.
I just checked another install of wordpress with User Role Editor and it's the same there. No way of deleting roles.