Since yesterday everytime I open my layout Editor in Eclipse for the Android UI I get the following exception:
Unhandled event loop exception
ja
I have not had that particular error, but I have had various project corruption problems related to resources. Sometimes cleaning the project and rebuilding fixes it. Sometimes I have had to revert some project files in subversion. Sometimes just relaunching eclipse fixes things. There is also a Fix Project Properties item in the Android Tools of the context menu that has helped once or twice.