I did a clean install of 10.7.4 using a USB drive. Afterwards, while re-downloading apps from the MAS, some apps got hung up on installing and never would complete. I had to reboot my Mac to get the MAS to unhang on the app. I'll then see the app in the Applications folder, but it's not on Launchpad (which I use). I have to delete the app and re-download to get it to fully install.* I actually tried another clean install of 10.7.4 since I hadn't gotten very far. Same issue continues. Never had this problem with 10.7.3 or earlier.* Anyone else see this or know a fix?