1. Open 2 panes
2. Open a file as a tab in say the right pane
3. 'Preview' a file in the left pane, ie so it opens the file but doesn't create a tab for it. (The title bar now shows the open file's name which is correct).
4. Focus the open tab (the title bar now shows the tab's filename which is correct).
5. Focus the 'previewed' file. The title bar still shows the tab's filename, not the previewed file's name which is wrong. Also, the sidebar shows the file as having focus, not the 'previewed' file.
Related to this, if you restart sublime, preview a file, then restart sublime again, you will see a nasty black pane and no tabs will be focused which is lame.