Comment 2 for bug 160086

I have determined precisely why this happens. If you enter a title, it will build the short name (appears in the url) from the title. If you enter no title, it uses 'default' but does not make sure the name 'default' does not already exist. The fix should be pretty quick, I just need to put that name through an INameChooser adapter and it should work. The quick fix is to give a title to the item you wish to add. Then if you really don't want it to have a title, go back and edit it, removing the title. Then the short name will be based on the originally entered title, but when you change the title, the shortname will stay the same (out of conflict).