Some of the thing I dont like about the way Lion (DP4) works and some bugs. Dislikes: In Mission Control, no way to select windows or applications using the keyboard. You can move from one space to another with the keyboard, but not between apps or windows. In Mission Control, windows minimised in the dock do not appear. Resume is a nice functionality, but not in all apps. I do not see why every time I open a document in Preview the last document I had opened should pop up alongside. To avoid this I have to remember to close the window first before quitting the app. Apple should perhaps turn Resume into an option that can be turned on and off for certain apps. Or, even better, rework the functionality so that Resume does not operate when you open a document other than the one you closed the app on. The iCal interface, with its faux leather header and torn paper effect, is UGLY. Bugs: The famous Launchpad bug (there is a post dedicated to it): the apps' icons dissappear progressively. Apple is said to be aware of the problem and working on a solution. In Preview, if you open several PDFs on one window and search of a specific term, then close the window the app will crash. That is not a serious problem, except that, thanks to Resume, when you open it again, youll have the same set of PDF open again, and if you try to close their window, the app will crash again, and so on, and on... Thats all for now.