I also experience this behaviour, with digikam 0.10.0 and kde 4.2.96 (4.3 RC 2) from the ppas. The digikam database appears intact, entries for the photos are still readable by opening the sqlite database. But digikam no longer seems to be able to do so, albeit it can read the album and tag trees just fine.
Ubuntu release ist 9.4, digikam is Version: 2:0.10.0-1ubuntu3
I also experience this behaviour, with digikam 0.10.0 and kde 4.2.96 (4.3 RC 2) from the ppas. The digikam database appears intact, entries for the photos are still readable by opening the sqlite database. But digikam no longer seems to be able to do so, albeit it can read the album and tag trees just fine.
Ubuntu release ist 9.4, digikam is Version: 2:0.10.0-1ubuntu3