On a new iPad Mini Retina w/IOS7, Dropbox v 3.0.2 crashes when attempting to open some (not all) PDF files. I created about 40 PDF files using the "Print >> Save as PDF" function in Safari on my iMac running OSX Mavericks. These are PDFs of web page articles to read later off-line. I created and saved about 40 of these in a DropBox folder on my iMac. These files open fine on my wife's older iPad2 using Dropbox v 2.3.2. All of the files open correctly on my iMac. The problem is with Dropbox v 3.0.2 on the new iPad Mini Retina, as well as in the app "Documents" by Readdle on the iPad Mini Retina. I uninstalled Dropbox from the iPad Mini, quit all apps, powered down, re-booted and re-installed Dropbox from the App Store. Same result. I re-created the PDF files and re-saved to Dropbox. Same result. I had email support sessions with DropBox support over a period of two days and sent them links to my "good" and "bad" PDF files. They tested and informed me that there was a "bug" with Apple (meaning IOS7, I suppose) and that they reported it to Apple. I contacted Apple Care. The first rep accessed my files through a link that I provided and confirmed the problem, but no solution yet. I'm waiting for a return call from Apple telephone support tomorrow. Any ideas? Could it be some complication (maybe a hyperlink or other feature) present in some, but not all, of the PDF files that causes a problem with DropBox or with IOS 7? Remember, the files open OK in the older iPad2 with an older version of DropBox. Also remember that the same problem exists with Readdle Documents. I'm stumped. Any thoughts?