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light uses cached cabs when it should rebuild them #3701
It's relatively easy to cause the cabinets in the cabcache to be re-used when they should be rebuilt: build an installer with the same File Ids where the source files differ but were created at the same time. In addition to checking the timestamp, it would be good if WiX would also check the source filenames and, if a checksum would take too long, the file size.