Updated app, still, old version is downloaded from the App Store

It may take up to a few hours for AppStore to display a newly approved app.

I have encountered this bug. I believe it is App Store bug.

This is a workaround solution to the bug. To download the real/correct version, go to App Store > Updates tab > select your app and update.

I also just encountered this bug.

Just received the standard app status "ready for sale" approval notice from Apple about an hour and a half ago. I didn't have the app on my iPhone 4, went to the app store to download the new version, and received the old version instead. All the meta-data was updated with the new release information.

As samwize mentions in the above post, the new version was available by going to App Store > Updates tab > select app and update.