Various windows like the Command Palette and Snippet listing (and other various menus from plugins) hide when the Sublimte Text window loses focus. This makes it insanely annoying to check out things on the forum or documentation.
(Example: the Package Control menus also hide on window blur; I was trying to enter an address into Firefox for a plugin’s Github repo, but I can’t type the repo name because the menu immediately hides when I click over to Firefox.)
I can understand hiding the menus when other areas of the app are focused (like the editor or sidebar, or another menu) but hiding when the application is blurred is just annoying.