Try doing:
meteor update --release blaze-rc0
As explained on the meteor-jade
github page:
Warning: This package is made for the new Meteor UI system, which is not released as a stable version yet. You'll need to run the
blaze-rc0
release.
I believe the next major release of Meteor (0.8 or 1.0) is supposed to include the stable release of Blaze UI. At that point, you should be able to just do:
meteor update