I love the "new" web UI - it is a big improvement on what went before and is a pleasure to use.
I think I've spotted a minor bug though. When a task is added/edited/checked/deleted, Toodledo does not update the count of the number of tasks in the left hand navigation panel until the whole web page is reloaded. This can be misleading in use. Ideally an update to the task would trigger an update in the corresponding task count.