Hi! I seem to be having trouble opening .pdf files on my HTC Desire (Android version 2.2). I download the file from my Yahoo mail and I get the message: "the document cannot be opened because it is not a valid .pdf file." I've been able to download and open/read files successfully in the past. I updated my Adobe reader app to see if it would solve the problem. It did not. It was a Word document (from a mac, Microsoft Office 2004) that I saved as a .pdf file. I emailed the file to myself. PLEASE HELP!! I can't seem to find answers. Thanks so much for any input/help.