A few hours ago, the Acer Germany page on Facebook (translated) posted an update stating that there was a fault with an important component in the A51x series of tablets. But Acer did not state which component failed to pass their quality control tests. Unfortunately, this means that there will be a delay in delivery of the Iconia Tab A510/A511 tablets, and Acer has been unable to confirm when the faulty component will be replaced.
Amazon has also stopped taking orders for the device as customers have reported that there could be something wrong with it.
Owners of the A510/A511 tablets who are concerned that they have a faulty device ought not to worry, as a recent comment by Acer on its Facebook page indicates that tablets that were already shipped passed their quality control tests.