Another update on the problem with Internet Explorer missing keystrokes.    Doing some more research I found another reference to the problem – specific to Sony VAIO laptops.   As suspected in the earlier post – the problem is down to the fingerprint reader software.

Here’s the post with the solution:

http://bwain-dump.blogspot.com/2009/02/sony-vaiointernet-explorer-typing.html

I’ve run through the steps in this post and haven’t had a dropped keypress yet – so looks like it’s finally fixed!