Could we get a summary list of problems & wish list of fixes to be done by Apple regarding ML? Snow Leopard was a good and stable version, but I had to upgrade to be able to do apps for new iOS 5. Otherwise, would advice everyone to be careful regarding the upgrade. I am using MacBook Pro / Intel 2.4GHz 8GB rotating 250GB disk Problems: 1. Using a second screen, closing laptop does not put the machine to sleep. Advices from Apple support did not help (PRAM reset, SMD). Usability degraded 2 out of 10. 2. Icons in finder sizebar for applications not available any more. Confirmed by Apple support. Usability hit 4/10. 3. When accidentally hitting Time Machine when laptop out of the range of TimeMachine just shows the TimeMachine window, but does not let you out but through hard boot. Usability hit 2/10. 4. Unnecessary change of AddressBook to Contacts and hiding ~/Library. Potential for screwing up your years old AddressBook. No help from Apple Support. Usability hit irreversable. Good luck I have everything in my Samsung Galaxy S2, and can recover. 5. Reduced size red/yellow/green dots in window; harmful and you really need to hit in the centre now. Usability hit 2/10. 6. Boot time; slowed dramatically. Per experience should not be a problem, but since five days upgrading to ML have spent time with tens of reboots. Usability hit 2/10. 7. Slowness; clearly one should not upgrade but go and get a new engine to really do the upgrade. Apple is on the Microsoft XP way now. Usability hit 5/10. 8. Some applications are incompatible, the applications identified. This is severe behaviour of any SW upgrade. One should be able to determine beforehand if to upgrade by the system to test if some of your apps are not going to be working, and which those applications are. Quality hit 10/10. 9. I am crying here, because there seems not to be a channel to feedback Apple. I would hope there is enough power, maybe through a group in Facebook to make it happen. Disappointed but forced to live with it.