You would think they would have made it easy for us to delete a PDF but quess not. Maybe things will change with the 2.0 update in the future. So check this out. Remove your SD card from the phone. Unmount it first. This can be done under Settings. Click SD Card & phone storage then click unmount SD card. Once that is done insert the sd card into an adaptor , insert adaptor into your computer card reader or an external card reader. Under Computer open the drive where the SD card is located. Once open Go down to downloads double click or right click to open. There you will see all the files that have been downloaded to the phone. Go to the PDF file you want to delete. Right click delete and wha la Gone. Remove SD card and replace back in the phone. Hope this helps. It worked for me. Take Care