Sometimes songs can contain non-displayable characters which mean the values are different but display the same, alternatively you may have space or tab characters at the end of the field. These problems can be caused by inaccurate editing of the data or by some taggers.
Jaikoz highlights the actual value so you can see any hidden characters. Undisplayable characters are displayed as  and there is an option in AutoFormat to remove them. If there is whitespace at the start or end of the field it is highlighted making it easy to spot.
Jaikoz supports Unicode this means you can add characters from virtually any language. If your keyboard does not support typing the character directly you can just enter the Unicode character, after exiting from the field Jaikoz will show its displayed value