Update - Version 3.6

16th December 09 

There was a problem with the App Store for a while yesterday - many Apps had an issue with old versions being downloaded even though Apple had approved updates. This results in the App not updating. Apple said they 'were looking into it' when I contacted them last night.
 
This morning, I ran the update again on our test devices and this time it worked... hopefully the issue will be resolved for everyone over the coming hours. Apple's recommendation is to wait a few hours and try again. From customer comments, it seems that updates are slowly distributed across different countries and those across much of Europe (but not the UK) seem to still suffer from the issue.
 
To save you from going through the entire guide, the new tips are: 5, 10, 11, 26 36, 40, 41 

Is this Apple's fault?

It would appear so... I've an e-mail from Apple telling me that this is a known problem and that there is nothing I can do to fix it. Argh!