Yes, I did have update: I found that my USB 3.0 ports were not under XHCI, but PXSX (in IORegistryExplorer). I then deleted USBinject and mXHCD kexts, and installed the latest GenericUSBXHCI. And then my two 3.0 hubs started working (one in the monitor and one stand alone) at full speed.
However, now I am having a different issue - when a drive is plugged into one of the 3.0 ports AND I open a Chromium web browser, then I will have a system freeze (screen freezes, no input allowed, and I have to manually restart).
