Hi Phil
I don't suppose using Captivate on Windows XP is an option
for you? This would seem to be a Vista related issue. Captivate 2
may work to an extent on Vista, but it would appear this may be one
of the "gotchas" one may encounter when using it in this
environment.
The good news is that Captivate 3 was announced today and
will work on Vista. I know this doesn't help you immediately, but
will provide an answer before too long.
Cheers... Rick