Has been already fixed. You can read more about the problem
here. (sorry, only German)
The problem is that current Intel chipsets violate the official specifications made my Intel (
) so older USB 1.1 devices like the aquaero 4 might not work correctly.
Download "Updatepaket für das aquaero 4" from this thread and update the OS first and the firmware afterwards with the aquasuite 4.72. The problem should be solved then.