Have a single photo library to hold all my pictures. Setup 2 Picture database directories using the --datadir paramter to hold different sets of pictures. Have had this setup for over a year and have not seen this problem. I'm currently running 12.10 (with a new level of Shotwell?) and am now seeing some pixbuf pictures from one picture DB show up when I start Shotwell to display the other DB. If I start up in DB 1 and select the bad pixbuf picture then enhance it the correct pixbuf picture shows up. I can then startup in DB 2 find the picture I corrected which should not be in DB 2. I can then enhance this picture to get the correct one but going back to DB 1 and find it incorrect again. This has nothing to do with the thumb files, have deleted all the files in the thumbs directories.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: shotwell 0.13.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.5.0-12.12-generic 3.5.2
Uname: Linux 3.5.0-12-generic x86_64
ApportVersion: 2.6.1-0ubuntu2
Architecture: amd64
Date: Wed Oct 10 20:19:35 2012
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120828.2)
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: shotwell
UpgradeStatus: No upgrade log present (probably fresh install)
Appears that Shotwell maintains a single cache of thumnails in ~/.cache/