iTunes 9.0.3: Ringtones may not authorize to play in iTunes

After installing iTunes 9.0.3, Ringtones may no longer authorize to play in iTunes.
  • iTunes repeatedly prompts to authorize computer to play iTunes Store purchases
  • iPhone: Purchasing and creating ringtones FAQ
  • iTunes: Missing folder or incorrect permissions may prevent authorization
  • iRingtones 1.0.1
  • GoGadget for webOS 1.0
  • Mac 101: QuickTime Player
  • eTunes 1.3.7
  • Bigasoft iPhone Ringtone Maker for Mac 1.0.8.3652
  • Bigasoft iPhone Ringtone Maker for Mac 1.0.8.3652
  • Bigasoft iPhone Ringtone Maker for Mac 1.1.2.3685