Please take a careful look at SDK Tools page. Your projects need to be updated using
android update projectcommand. As a result you will see that
default.propertiesfiles are replaced with
project.properties. The plugin will run this update if you open the project customizer (right on project node and select
Propertiesmenu item) close it with OK. More significant changes are under the hood. Android team reworked the way how projects are build. The build should be much faster especially if you use Android library projects. And while Xav admits that the old implementation of libraries was fragile in Eclipse I can add that it was not great for NetBeans either. Our concerns are gone now and updated version is nicer.