iBooks automatically generating cover pages for PDFs? I've loaded some lengthy PDFs onto my iPad in iBooks, and I've noticed that for only one of them, it's seemed to have created a beige cover page for the PDF thumbnail with what looks like the file name. It's nice, but I was unaware of this feature and ideally I'd like it to include the author and paper title instead of the file name. Does anyone know more about this functionality or how I can change what this new cover page says?
I am pretty sure the thumbnail is created from the first page in the pdf document.

So to alter the icon you could add another coverpage to the pdf document.