[fridrik]

You may have to click the "Buy" button a second time.

I live in Europe so I'm used to seeing prices with added VAT. When I launched the app store, however, my item was priced at the U.S. price of $19.99. However, after getting this error once, the app store was reloaded with the correct price tag and a functional buy button.

[mysterywhiteboy]

I'm going to avoid clicking too many times - Apple has previous in charging people multiple times, e.g. when Lion was released last year [1].

[1] http://www.appleinsider.com/articles/11/07/27/paypal_users_m...

[Derbasti]

I still can't download it though. Still getting that error 100

[edemay]

App Store error 100 fix http://www.macstories.net/mac/how-to-fix-mac-app-store-error...

[adiacente]

Didn't work for me either. Guess we'll just have to wait.

[Derbasti]

Does not help