When issuing a Save Records as PDF, either by this command or Print, the PDF did not generate. Choosing View would display the gray thatch-work/ios/lion screen, the Done and action controls did appear and work. Shutting down and retarting FMG (the app not the device) resolved the issue.
Happened once after several days of testing. Have not been able to reproduce. Will follow up if I do.
Apologies if already reported searched for PDF and Gray (and blank) screen and didn't find it.