Oracle has released version 4.1.2. of its virtualization software VirtualBox. This version which is a maintenance release can be installed on top of VM VirtualBox 4.1.0 which was released in July this year.
This release fixes a problem with 64 bits guests on AMD Fusion CPUs and adds linked clone support to the VirtualBox Manager GUI, which Oracle couldn’t get done in time when releasing version 4.1.0.
More details on what changed can be found in the changelog.