When you config desktop wallpaper and set a time to change wallpaper among a list of files, you can see here is a time picker.

http://i.imgur.com/DR2Unf8.png

Problems:
1. If you increase seconds from 0:0:59, the time suddenly becomes 24:45:0, not 0:1:0
2. Users can type 60 in seconds. But if now you change hour and minute to 0, it will crash or freeze the settings window.
3. If you set 0:1:0, it always change it to 0:1:1 next time you open settings window.

Reproducible: Always