Issues with Xcode 4.3.2 Mobile Device Framework Installation

After downloading this newest version of Xcode 4.3.2, I tried to open it.

Xcode greets me with Xcode component installation, stating that Xcode must install the following components before continuing

So I click install and type in the correct administrative password.

But immediately after this, Xcode gives the alert " An unknown error occurred. See the install log for more details."

However, the log proves to be not helpful at all.

Apr 9 22:42:06 mediter diskmanagementd[30360]: DM ->T+[DMToolBootPreference getPartitionBootability:]: inUDS=0x101146c30=disk0s2=Mighty Lion

Apr 9 22:42:06 mediter diskmanagementd[30360]: DM ..T+[DMToolBootPreference getPartitionBootability:]: PMBootable=1 (bootable right now without any further action)

Apr 9 22:42:06 mediter diskmanagementd[30360]: DM ..T+[DMToolBootPreference getPartitionBootability:]: PMBootCapable=0 (bootable if you call MKCFPrepareBootDevice)

Apr 9 22:42:06 mediter diskmanagementd[30360]: DM ..T+[DMToolBootPreference getPartitionBootability:]: PMBootSurgeryRequired=0 (for primitive MBR on BIOS, add boot block and loader)

Apr 9 22:42:06 mediter diskmanagementd[30360]: DM ..T+[DMToolBootPreference getPartitionBootability:]: PMFSSurgeryRequired=0 (for primitive MBR on BIOS, add boot block and loader)

Apr 9 22:42:06 mediter diskmanagementd[30360]: DM ..T+[DMToolBootPreference getPartitionBootability:]: PMNewfsRequired=0 (bootable with MKCFPrep but it will rudely carve)

Apr 9 22:42:06 mediter diskmanagementd[30360]: DM <-T+[DMToolBootPreference getPartitionBootability:]: MKerr=0 out=132=0x84

I tried to repair disk permission, then restart to try Xcode again, the same issue occur.

I really can't figure out what went wrong here. Could anyone please offer a helping hand?

Thank you very much!