I've suspected this for a while and finally confirmed it: new files added to my monitored folder are not being added to the Inbox (or Music). Restarting doesn't help. I've checked that the right folder is selected, etc. "Scan folder for new files" on the same folder works fine (although MB had a silent crash just afterwards - no error log).
I don't think it's related, but since the 18th, this message has been appearing in the log every time I restart MB (there had not been any errors for almost 2 weeks prior). It's really weird because "scamp" had not been my user folder for quite some time before this error started appearing, and when it was, that album had not been added.
5/22/16 6:03:23 PM - 10.0.10586.0 - 3.0.5986.36706 - System.UnauthorizedAccessException: Access to the path 'C:\Users\scamp\Music\Inbox\George Winston\Winter Into Spring\' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, Object dirSecurityObj, Boolean checkHost)
at System.IO.Directory.InternalCreateDirectoryHelper(String path, Boolean checkHost)
at System.IO.Directory.CreateDirectory(String path)
at #=q1szifdidQJdHauwsTQR$2al6HTSzEpsBopm3HZ5exTM=.#=qmy0yuOUbs5XPjGCe6vu7YQ==(#=q$H5YSEiQcr_GaU8k3I3cUdWZ1J_X9uMpDP0t9FuYxSQ= #=qDLrrK1K4OSW7IUB6dCM3SA==)
at MusicBee.Media.StorageManager.#=qbdwfRnV5ettF99CWUUhrIQ==(#=qdNgP0cebVatePWeWRrcYpb7e1$1snXJhGAYmN60KsOw= #=qWNEajmyquudIW8ofKsTsYw==, #=qsrv3moFgKA8IUjxe6Mb8HA== #=qwPkxFl2OClYL05$AotGNgA==)
at #=q9nXp0oorx$57Mi3raHDKiqRsPHMzTlT6N8TEJ7h8H70=.#=qgumCMj7jWsdCJuHd_bN90Q==.#=q7D28QOUayLevjQdoC6otrVzDTmouv6vFdis3qCgf9Kw=(#=qdNgP0cebVatePWeWRrcYpb7e1$1snXJhGAYmN60KsOw= #=qg8wURl6iIEkOkEEDNvzPag==)
at #=q9nXp0oorx$57Mi3raHDKiqRsPHMzTlT6N8TEJ7h8H70=.#=qgumCMj7jWsdCJuHd_bN90Q==.#=qmPAfy5zzOdjfD7xvh0_BGA==(List`1 #=qrcqj3Fr$bQktSxf$EGCkRw==, Boolean& #=qDSX7PMb72dNT$etzhhZwyBJyN7$iGvlW4nHawGVHYY8=)
at #=qvuOL8sBmzBL65gR$XsnJ$LA92SUncffhj8HjctxQJvI=.#=qrY0FehmL6BMpeOKlnKpHMC6w7feGcxiC4dm7IKJVetY=.#=q2QTmwkcIamwn1YB8eBIfdw==(Int32& #=qm5ezqWTOEagyExzbs2xvBg==, Int32& #=qLaOpJBr3p5nFaPBi5oE9HqV0QNjTiOU4sBvdOfDzRD8=, List`1 #=q1uw_5NhjaYJ9T9OnE1DObA==)
at #=qtCWE2_MHZGOCdQGgoOLxNdD5GYV0D5wjmuQw3BAtOt8=.#=qvfVALLAN5qhI6LArYYV4btjG7fg$Y03PxZlLDOqHIOY=()