OK - getting a little more interesting...
I don't have a USB keyboard but will try and get one later today so I couldn't try your ideas at this time.
But I went back to the flash key and did some tests. If I plug it in directly to N800 every thing's fine. Remove it and plug it into the hub and then plug the hub into the NIT then everything is fine. Start all over and plug in the hub and then plug in the flash key in to the hub, it doesn't work. with USB Control program changing between periphrial/OTG/Host makes no difference. Then removing the hub and plugging it in again - nothing. Plugging the flash directly in - nothing. It seems to get into a state where where I can only get it back to working is by turning it off then on. I'm sure there is an easier way but that works Looking at "top" there doesn't seem to be any funny USB named programs running...
I must be doing something wrong with USB control or this may be a bug? but the only way to reset it is to power it off and then back on.
Is this normal or are we getting closer to something.
TIA
C