Whether you've lost any bars or not, it would be great to get everyone's experience into the Plug In America Leaf Battery Survey.
There's more data captured there than in this poll, so we can see not only bars but model year, build month, and geographic region. The data is especially helpful if you can enter Gids or pack Ah. If you do reports periodically, you can see your car's history.
There are charts that show miles vs. capacity bars and capacity percent (from Gids or pack Ah), and you can overlay any vehicle's report history on top of the most recent data from all the other cars in the survey.
All of the data (excluding personal info: name, email, VIN sequence number) is available for download so anyone can look at the data for any sort of analysis.