Latest round of updates (including a Synaptics update) seem to have resolved this issue. Very pleased!

Nope - still happens.

It seems to happen most when the laptop goes to sleep itself and then I unplug the USB mouse and wake it.

Funnily enough I've just tried this Simple. I tested a hibernate and it looked like it worked.

I'll run it for a few days to see if it's truly fixed (as I've seen it work on a forced hibernate...

I get this on my Sony Vaio - I found a thread of people discussing an issue with an early Synaptics driver but mine is a few versions past this. If I boot the machine with a USB mouse plugged in - no...