I've just been looking with the log file viewer and maybe this points to the problem?:
uhub_reattach_port: device problem (USB_ERR_TIMEOUT), disabling port 1
I don't believe the mouse or USB controllers are faulty because this never happens in Ubuntu - I'm not saying Ubuntu is better btw.
I'm using the same mouse, right now, in PC-BSD.
I've also discovered that irq17 mentions "xhci" (USB 3.0):
xhci0: <NEC uPD720200 USB 3.0 controller> mem 0xf6500000-0xf6501fff irq 17 at device 0.0 on pci3
Does PC-BSD use power-saving on the USB ports? If so, I had to turn this off in Windows 7 (USB power saving, in the Power Saving settings) because I had the same problem at bootup with the mouse.