Hello,
When I view the books as Virtual shelf > Blue (thanks for adding that option I use it often and like it very much) and then choose View > Group Books By > Author and then select any book and click on, for example, Date added (not through the View menu but through the text with the book information) and choose Sort book list by "Date added" the left part of the screen stays empty. The books are not listed by date added, the books aren't even there. The same goes for Location, Language, Pages and Binding type.
I need to choose View > Virtual shelf > Blue and then View> Group Books By > Author again for it to work.
Regards,
Martin