Q: Booting safe mode hangs during fsck_hfs rMBP + 10.8.0

When trying to boot in safe mode (holding down shift while power on) to troubleshoot issues with the upgrade to 10.8.1 the boot process hangs indefinitely.

When switching on verbose and safe mode (nvram boot-args="-x -v") I see that it proceeds until fsck_hfs is run.

The last message from fsck is: "** check catalog"

There is another message probably unrelated after this:

AppleUSBMultitouchDriver: check state - receive state packet payload 2, device was reinitialized.

After this it hangs (waited for hours).

Already did a internet recovery install of the OS and nothing changed.

Normal booting and recovery system booting works without problems.

When I Verify-Disk in Disk-Utility everything is fine.

Can't upgrade to 10.8.1 because there is also problem with the App Store ugrade (doesn't show upgrades)