That's it Twitter this week a new updated one was released version for iOS, for “bug fixes” but apparently the new version came with a bug.
Device owners with iOS they report to iTunes that the 6.1.1 version of Twitter came with a bug that prevents themovement of the application. It is not clear if this problem affects all of them or only certain devices that have been "hacked". However, either way Twitter should release the new version soon.
If you already have the latest version installed, unfortunately, there is no way to "downgrade" it to the previous one, unless perhaps you have the old IRA in its library iTunes or maybe in a recent backup.