Hello,
It is “fixed” in the sense that the circuit now works as designed. However, it has been designed to have the ability to send power into your USB port if your main power supply ever drops below about 7.4 volts. While we have not heard about any computers being damaged by this, USB devices are definitely not supposed to behave this way, and it has the potential to cause damage. I recommend not having both USB and external power connected at the same time.
-Paul