ShellShock .........
Count me among many resurrected & happy W7 Calibre \ iPad \ Marvin users with our books back!!
After solving a coincidental Calibre "Database Error: database disk image is malformed" exception by UnInstalling & ReInstalling Marvin v2.8 on iPad iOS 8.1, over-writing my 64bit Calibre v2.7 & upgraded v2.8 limobile files with your "DLL Trio" as directed, got me up & going.
Again, Sure Appreciate Your Persistence & Hard Work!!!!