Sometimes a confirmation dialog will popup in a window, and I'm not sure about what conditions cause this, but it gets stuck "between" spaces so you will catch

Sometimes a confirmation dialog will popup in a window, and I'm not sure about what conditions cause this, but it gets stuck "between" spaces so you will catch a glimpse of the dialog while switching spaces, but it vanishes once the desktop-changing animation finishes. This is often a blocking dialog, so the app becomes unusable (from memory it's happened with Safari and Dreamweaver). The solution is to stick the mouse cursor in the middle of the screen, switch to the space the dialog should be on and click madly to make sure the dialog gains focus, then do the switch again but hit space or enter to take whatever the default option is in the dialog. The second, less severe issue is that it will yank you between desktops 3 or 4 times for unclear reasons. It's sort of as if someone else is controlling the desktop switching and they just want to annoy the crap out of you. FWIW, I used Desktop Linux/BSD for ~8 years before going to OSX, so maybe I have just been spoiled by a very old (eg, well debugged) virtual desktop implementation in X11.