My configuration:
2.2GHz Quad-core Intel Core i7
8GB 1333MHz DDR3 SDRAM - 2x4GB
Intel HD Graphics 3000
AMD Radeon HD 6750M with 1GB GDDR5
256GB Solid State Drive
SuperDrive 8x (DVD±R DL/DVD±RW/CD-RW)
MacBook Pro 15-inch Hi-Res Antiglare
Anyone can reproduce this with the new 15" MacBook Pro:
- Login with user1
- Faster user switching to user2
- Launch iPhoto
- Logout user2 (with iPhoto still running)
- Login back with user1
- Launch iPhoto
-> iPhoto hangs and will never start. This only happens if "Automatic Graphics Switching" is enabled in System Preferences. Looks like a bug with the Intel HD 3000 driver

The only way to launch iPhoto after this is to restart the MacBook Pro...
