Grrrrr. I have all my apps laid out in different spaces, kinda as follows: 1. Finder and little apps like FTP software. 2. All other random apps (Synk, etc) 3. InDesign/Photoshop/Dreamweaver 4. Safari 5. Mail 6. Lightroom 7. VMWare Fusion. Etc.. Now sometimes apps refuse to stay where they are forced to. The Adobe software is the main culprit. It flatly refuses to stay in Desktop 3 (when told to stay in Desktop 3 after right click -> options). So if I alt-tab to safari and alt-tab back sometimes it won't switch back to desktop 3 but open in the safari desktop!!!! In addition to that, I'll alt-tab to InDesign and Photoshop (or whatever app is also on that desktop) will appear instead. I have to double or triple tab back and fourth before it appears. GRRRRRRRRR! This is the first OS X operating system that I have properly got annoyed with. PS: I can't go back to SL due to Mail and TM upgrades :roll eyes: Apple/Adobe PLEASE FIX THIS.