I have just upgraded to iOS 6 and can no longer view PDF files from email on my new iPad. The preview image appears fine and when I tap and hold on it, the "Open in.." window appears with app icons. When I pick an app, the popover goes away and nothing happens. It doesn't seem to be an issue with other files, just PDF. I have tried picking a number of apps and the issue is the same. The same file opens fine on my iphone too. I can use the Open In functionality from GoodReader so the problem only seems to be with Mail.
Has anyone else experienced issues with this? Is there any way of fixing it? I'd also like to turn off the PDF preview in Mail if possible so the file just shows as an icon.
I've figured it out. It seems that too many of my apps are able to open PDFs. I deleted a couple that I only use rarely and that seems to have solved it. I couldn't previously see the Print or Quick View icons which have now appeared.
Thanks for your comments guys.