Update 5th March 2013 - I have just tested DiaryBooker on iOS v6.1.2 on an iPad and it seemed to work fine :D YEY!

The latest version of Apples Operating System and therefore the Safari Browser on iPads (and some iPhones) was updated to iOS v6 and one of the parts of that update actually broke one of the rules of the internet, which directly effects the way DiaryBooker works and prevents it from loading up in the first place.

More information about this can be found in http://code.google.com/p/google-web-toolkit/issues/detail?id=7703

We are looking into seeing if we can incorporate any fixes into our product, but at present it looks like we will just have to wait until Apple releases iOS v6.1 which fortunately is expected to be released in the next couple of weeks: http://www.idownloadblog.com/2013/01/23/apple-beta-ios-6-1-release-jailbreak/