When I go to the 'Organise' tab when in the beta, and I go into a 'tag', and I want to delete the app associated with that tag, I tap the 'edit' button, tap the red circle, the option delete comes up. When I tap delete, the app crashes and then quits. :-B
There is also a syncing issue with this beta version as well! (Dropbox).
Also, when I tap a folder (frequent, for example) and tap 'edit' the app crashes and then quits.
When 'Quick Unlock Code' is enabled, and you enter the code (after you've closed the app) the unlock button doesn't line up (or the text in that matter!).
There is also a small delay when entering the third character of the master password in the beta... (iPhone 4S).
By the way, love the new lock screen! :x