It happened to me again! Every time I attempt to create a new brain based on another one I created, the new database contains no tables. If I create a new brain based on the default brain, all the tables are there. I can, however, copy the .db file and rename it so it works with my new brain. As I said, I don't know if this is related to your problem or not, but there seems to be a bug in Hal. I can't imagine why a fresh install would contain no tables. Perhaps this is something for Robert to look into.