I found (on the september-last cvs) that If I try to connect vector file to postgreSQL table grass DELETE that table. I work with that function for over year, and I have never such problems - because it is very dengerous, I will test it and describe with detail in few days, for now please let me know If something were done with pgsql driver (there are some records in changelog file).
I only announce that problem for now, because testing reqires some time (privileges, layers, categories) and problem also may lay on postgreSQL (and probably lies -because database shoudn't allow do delete table any external program in anytime)
regards
Jarek Jasiewicz