Kindle for iPhone 3.1 can't sideload
I have a problem with Kindle app for iphone (iPhone 4, 5.0.1). After upgrading the app from 3.0.1 to 3.1 I noticed I can't sideload any content from my PC. Nor via USB (through software like iFunbox), nor via WIFI through iFile. Using iTunes works, the book shows in Kindle app menu with cover and opens fine. But when I use aforementioned methods - no go, Kindle app crashes. To be specific - when I put a book in Kindle\Library\eBooks folder, it shows in menu without cover and when I try to open it I get a popup with error telling me redownload item, re-register etc. Of course non of this helps. Putting mobi file to Kindle\Documents crashes the app instantly, it won't even load to menu, only titleboard and back to springboard. Judging from recent reviews in appstore this is a common issue with 3.1. Anyone knows how to deal with it so that simple sideloading works again? Many thnx in advance.