Uh oh. I would love to know more; we haven't seen those errors in testing. +Marco Rodriguez-Suarez
are you also on Win7/x64? And just to make sure, you both installed the preview tools (using the SDK manager) and
the new Eclipse plugin using the preview update center correct?
Second, do you have any errors in your error log? (Window > Show View > Error Log). Probably too large to paste here, can you either e-mail me (firstname.lastname@example.org) or file a bug (b.android.com
as a "Tools Bug") ? Any other clues (output in the console or elsewhere). Which rendering target are you using?