SMF Version: 2.0 Beta 3 Public
whenever you try to enter non-english chars as name of the filed it will give you a duplicate entry for the empty string
if you have a filed name that starts with non-english char the col_name will be empty for this field
you can enter it once but after that it will give you error column name not unique
for example:
1-field name: 'تجربة' => col_name => ''
2-field name: 'testتجربة' => col_name => 'test'
3-field name: 'تجربةtest' => col_name => ''
as you can see 1 and 3 cause the problem because col_name is empty string therefore, it won't be a unique entry.
i didn't add spaces because it doesn't make any difference because they are removed by the code.
I tried Japanese same problem
char-set is UTF-8
Thank you Bug #1885: Custom Profile Fields do not respect foreign characters (http://dev.simplemachines.org/mantis/view.php?id=1885)
Since mantis won't post the utf-8
First test I did I used: "تجربة"
Second test I used: "تجربةتجربة"
Third test I used: "تجربةتجربةتجربةتجربةتجربة"