I've recompiled the android-support-v4 source with some debugging flags. When I add this modified jar to my project under SupportLib, I get the following error
You have Jar libraries, android-support-v4.jar, that have the identical name with inconsistent file contents. Please make sure to remove any conflicting libraries in EmbeddedJar, InputJar and AndroidJavaLibrary.
Based on your release notes of Xamarin.Android 4.2.8, the SupportLib step is no longer needed.
If that step is ignored, how can I get the Xamarin tools to use my new jar file? I've tried moving the jar file from /sdk/extras/support, but the tool still compiles successfully. Where is the android-support-v4.jar referenced from?