Not really sure where you're getting this from. Everything I have read points to the opposite. General relativity may be incomplete, however, there are dozens of different experimental proofs to support it, including lensing and redshift experiments. Here is the most recent example from 2 days ago:
http://news.nationalgeographic.com/news/2010/03/100310-einstein-theory-general-relativity-gravity-dark-matter-proof/
Heh.