This happens from time to time. I want to rename a folder. Then appears the message : "this is not a legal folder name. Certain special characters are not permitted". I am sure I am using characters that are permitted. Then I click ok, reenter the same name, then the folder is renamed. I
Nothing specific, the folder names are autogenerated with date, then I click rename and add a name next to the date, and sometimes I get this message, then when I reenter the exact same letters, the folder is renamed.