I connected my Edge 520 to Garmin Connect over the weekend and failed to notice that it downloaded the v3.00 software update. This morning I had to wait for it to load the update before I rode. In typical Garmin Sports style, the update isn't perfect. Here is what I did to get it to work. It boots like a new device but still has all of your information on it. Accept all of the information about yourself such as age, weight, etc. Select "no" for connecting with your sensors or with bluetooth - those devices are still in memory. The device just hangs when "yes" is selected. I don't know if the 510 or 500 are included in the update. Here are the features of the software upgrade:

Changes made from version 2.30 to 3.00:

• Added support for Varia Smart Bike Lights. Now you can form a network of lights including head lights, tail lights, and a rearview radar tail light.
• Added support for sensor software updates
• Added the ability to edit crank length for PowerTap P1 pedals
• Added dynamic zooming while displaying the elevation graph during an activity
• Added a Percent Effort option for adjusting the virtual partner speed when following a course
• Added a preview of an incoming text to smart notifications
• Updated the FTP test to include setting a goal and accepting or declining the test results
• Fixed an issue preventing accurate data from being displayed with an HRM-Run
• Fixed an issue preventing the elevation graph from being drawn correctly
• Fixed an issue where segments would randomly not start
• Fixed an issue where courses would sometimes not start at a point along the course but away from the start location
• Improved device performance with many segments loaded
• Improved device performance while navigating through the list of courses
• Improved stability of device-to-device transfers
• Various fixes for general improvements to stability and performance