2. lack of RSS support.
3. multiple processes vs. multiple threads.
4. less features in bookmark management.
5. lack of extension/user script support.
6. lack of resume feature in the default download manager.
Keep in mind, it's still in beta. So, problems are expected. Chrome will be better in future releases. Even in this beta release, it's already had numerous good features, such as speed, dynamic tab, sandbox tabs, ...etc.