Small misfeature: create two subdirectories in one directory, one called 'TEST' and second called 'test' - on unixlike system it is perfectly legal, and they are two different directories. Then save some drawings as 'TEST/test1.dwg' and 'test/test1.dwg' (they should be different drawings, so one can telll which is which). Then close them and try to open: You can only open one of them, when opening second one you would get the first one instead - for drawsight 'TEST/test.dwg' and 'test/test.dwg' is the same file, but on filesystem there is two files. So if somebody create directory with the same name but different casing, draftsight will open files only from one of them...