Unbinding of configuration in the ConfigManager class of the Web Console has some issues:
(1) If not configuration exists for a provided PID when unbinding is requested, a NullPointerException is thrown because the config variable is not null-checked
(2) Apache Felix Configuration Admin 1.2.8 sets and persists the static bundle location with the Configuration.setBundleLocation call. On the other hand internally a dynamic location is maintained if configuration is assigned to a ManagedService[Factory]. If the static location is cleared, the dynamic location is still set and calling Configuration.getBundleLocation still returns that dynamically assigned value. With a work around we can force the dynamic bundle location to also be cleared: If the bundle location is not null after setBundleLocation(null), we do setBundleLocation(non-null); setBundleLocation(null). The first call clears the dynamic bundle location while setting the static location to some non-null value. The second call then resets the static location back to null.
This second issue will probably be solved once the R4.3 Configuration Admin specification is publiziced and implemented, which handles bundle location setup in a more controlled manner.