When I open a PDF attachment in Thunderbird, an empty PDF file is always created on my desktop. The name of the empty PDF file suggests that I had received it by email and read it sometime in the past, but since then I have deleted the email to which it was attached and I can't find in any of my folders using the search facility. I get this problem using Thunderbird on any of my Window machines (laptop, desktops home and office). I don't get this problem when I use Acrobat by itself, only in combination with Thunderbird. Thanks for any help!