The 2 bugs that are glaringly obvious that I have found are thus: when clicking the 'personalization' on the beta maps, ALL cache icons disappear...that's really not good, if seeing your personalized cache info is the whole point! 2: the personal statistics aren't available...is that coming back?
The look is different, but not so drastic that you can't find your way around, so that's good, but PLEASE fix the maps; that's enough off-putting to stop using the maps...and to a certain extent, caching too; major step backwards in usability.