I get this behavior consistently also with Kingston USB drives. However, one wrinkle not reported above is that the USB drive is initially mounted at USB 2.0 speed as expected, but after the first "Safely Remove Drive" it is always remounted at USB 1.1 speed only. My Kingston drive uses different colored LEDs to report the different connection speeds (red for USB 1.1, blue for USB 2.0).
I get this behavior consistently also with Kingston USB drives. However, one wrinkle not reported above is that the USB drive is initially mounted at USB 2.0 speed as expected, but after the first "Safely Remove Drive" it is always remounted at USB 1.1 speed only. My Kingston drive uses different colored LEDs to report the different connection speeds (red for USB 1.1, blue for USB 2.0).