We just released version 1.102 of the Lato family. You can download the fonts now.
This version is a technical fix: it
no longer causes problems with Adobe CS apps, and includes some basic OpenType Layout features (liga, case and sups). This release is targeted especially for users who want to use Lato in desktop applications.
UPDATE: Version 1.102 still does cause the same problems. It has since been resolved, so get the newest version!