Are you downloading directly from a camera or are you taking the memory card and inserting it into a memory card reader? When downloading directly from a camera or a phone, Rapid Photo Downloader uses gnome system libraries. The gnome developers do the best but they have bugs. A possible workaround is to use Nautilus to copy the files onto your desktop, and then use Rapid Photo Downloader to import and rename them as you prefer.
Are you downloading directly from a camera or are you taking the memory card and inserting it into a memory card reader? When downloading directly from a camera or a phone, Rapid Photo Downloader uses gnome system libraries. The gnome developers do the best but they have bugs. A possible workaround is to use Nautilus to copy the files onto your desktop, and then use Rapid Photo Downloader to import and rename them as you prefer.