This was a bit of an unexpected surprise, but definitely a welcomed leak. It seems these devices are getting new OS' left and right, which is a good sign for progress towards OS 6! If you're a Bold 9000 or Curve 8900 user you will find this OS .610 very handy if you've got time to load it up.
*DISCLAIMER* - This is an unofficial RIM software release. If you choose to install, do so at your own risk! BB Leaks is not responsible for any malfunctions or abnormalities that may occur.