Leopard's Time Machine is a huge step forward in backup for the average Joe (or Jane). However, one problem is that applications can tell the system to not back up certain files. This is intended to avoid backing up working files, cache files, and such that don't generally need to be backed up. However, we know that VMware, at least, is using the mechanism to quiet exclude virtual machines from being backed up, and others could come. While this makes sense in some ways, it could easily lead to a disaster for those who aren't aware of it happening.So, with that background, I played around for a few minutes and I figured out how this flag is stored. Turns out that Apple's doing the right thing here and using the metadata store. This means we can find the files with the Spotlight engine. To do this from the command line, do this:sudo mdfind "com_apple_backup_excludeItem =...

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