A great example of using the archive to debug issues revolving around a build level or handset is the GSON issues that occur with Acer devices (and HTC) which is where I ran into it.
Tuesday, April 17, 2012
Android Source Bug Reports
A useful tool for debugging is the Android Bug report database where known issues with the Android code base are reported and tracked. This repository is particularly useful when debugging an issue that seems to be occurring on a particular brand of handset or Android build level
