When I try to deploy my project to the emulator the compile fails with a bunch of Cannot find symbol errors. I have to rebuild the project then deploy everytime I make a change. This just started in 0.1.6 for me. Anyone else seeing this?
As a temporary workaround, try turning off Preferences > Compiler > Use External Build.
(as suggested in this issue: https://code.google.com/p/android/issues/detail?id=56884)