I am having trouble exporting a FormsCentral response as a pdf. Regardless of the method I use, the pdf file gets created, but then I get the following message: "Acrobat.com could not save this PDF file. The file might be open in another application and cannot be overwritten." Since the file was just created, it can't be open in another application. This happens regardless of where I try to save the file (desktop, dropbox, other folder.) I am using a Mac, running OS X Lion v. 10.7.5. Any ideas what the problem is?