Select All.... In the previous version, selecting all email at the top, only selected a viewable page to choose and then subsequently delete a swath of emails associated to ONLY that page. The Beta version selects ALL emails, making it harder to manage and effectively choose only the ones you want. Also Deselecting should ONLY change the state, not every other email --- both of these together, makes selecting a page of emails and only deselecting the one that you may want to view. Please bring back the old methodology.
Chad M Evans commented
On the old version, when I checked the box at the top, it only check marked the emails that were visible on the screen, which worked well for me. Now it check marks every email, even the ones that are below the last one that is visible, and this has cost me a lot of time, because now I have the check each email individually.