I'm not aware of a save table issue. I just ran this and had no problems:
arc> (save-table (obj a 10 b 20) "tfile")
nil
arc> (load-tables "tfile")
(#hash((b . 20) (a . 10)))
edit: IMHO I would avoid using save-table/load-table as data storage mechanism. It may work for certain application designs[1], but otherwise you would be better off writing to a real database.
