Microsoft has allowed a select groups and businesses to download and use the RTM versions of Windows 8 and Windows Server 2012 in mid-August. While the rest of us will have to wait until October 26th to get Windows 8, Microsoft has already issued the first minor software update for their next operating system as well as Windows Server 2012.
The small download is just 2.4 MB for the 32-bit version of Windows 8 but goes up to 4.3 MB for the 64-bit version of Windows 8 as well as Windows Server 2012. All of these updates fix the same issue. Microsoft states:
Assume that you add a shortcut to a file to the All Apps view in Windows 8 or in Windows RT. Then, you change the file association of the type of file that you created a shortcut to. In this situation, the tile image in the All Apps view is not updated to reflect the new file association.
According to the patch notes, this update is supposed to be for Windows RT devices as well. However, since there are no Windows RT products available to purchase yet, Microsoft has apparently not made that version of the patch publicly available.
Source: Windows Download Center | Image via Microsoft