It seems that Adobe released their version 1.4 a bit prematurely. They have pulled 1.4 from their site, and recommend that you you delete it, and reinstall the previous 1.31 version.
It seems there are some big in the release that cause some metadata information to get messed up, as well as some other things that are not too good!
Rather than write it all out here you can read the details on LR news.