You know us; we have nothing for love for RIM but it seems that its case of ADD is a lot worse than previously thought. For the better part of a week we’ve been playing around with a new beta build of OS 5.0 and noticed that it has a new feature that has yet to be seen on any other OS 5.0 betas — tabbed browsing. Sound a bit familiar? Well it should, because RIM has been working on getting tabbed browsing right since at least June of 2007. As it stands, the process of opening a new tabs isn’t something we can complain about (all that you have to do is hit the Menu button, click Tabs and then New Tab), but switching between two or more tabs is, quite frankly, a huge pain in the ass as there is no keyboard shortcut. This strikes us as rather hilarious as BlackBerrys are legendary for the speed at users can fly around the devices. We’re praying that the clunkyness of tabbed browsing is just because it’s not ready for prime time and that some added functionality, including shortcuts, will hit before launch. Hit the jump to see tabbed browsing in action.