I have just discovered this too, as a result of an earlier post. ~My
Netboot has been out of action for over a week as a result. I eventually got
round to raising a query on
ubuntuforums.org/showthread.php just yesterday and
found the solution this morning reading back in this group.

Your experience on Tech support was similar to mine with Logitech wireless
keyboard, which the retailer sent back to the manufacturer who sent me a new
one. It had the same (software) problem of course, then after several technical
sessions with Logitech Support I solved it via a Tech newsgroup as being
infamous 'Mouse keys' again. (no deliberate pun on infamous!) I mentioned the
hack to Logitech and did not get a reply!