I just wondered how many people might still use iPhone OS versions below 2.2. So I analyzed the traffic for one of my larger websites to get the distribution of the different iPhone OS versions. There where 862 samples (unique visitors) from 10.04.2009-17.04.2009. Please note, that the traffic is mainly from Germany, but I guess the distribution should be roughly the same worldwide. So here are the numbers:

iPhone OS 2.0: 1.04%
iPhone OS 2.1.X: 2.20%
iPhone OS 2.2.X: 96.75%

Looking good for 2.2

Aperture’s backup mechanism is great for backing up the Aperture 2.0 library to external drives. Since it usually works absolutely flawless I was kiond of shocked when one day the backup wouldn’t start and I was presented with the error message

Update Vault Error:
10 errors occurred. The first 5 are:
Aperture has detected a problem with the vault “Main Vault”.
You need to remove this vault and create a new one.

Obviously I tried creating a new vault, but got the same error message when starting the backup.

What I had to do was remove the plugins I had installed. The plugins are usually located in the directory “~/Library/Application Support/Aperture/Plug-Ins/Export/”.
After this I could update my vaults again…