rowid's changing

I have a table (nothing special; not fragmented or anything) that = changes rowid's whenever I update a row. For instance I'll have two screens up. The first running isql query -> = select rowid, * from table where key_field =3D "key_value" The second =running sperform on the same table. Using just the normal update = function when I hit escape, if I re-run the query from screen one the = rowid is now changed. Also if I hit update in screen two again I get an = error (100), I believe because isql has now lost track of the row. =20 I have been talking with technical support and they have never heard of = this. Also we are unable to re-create it. Therefore they can't really = do anything to fix the problem. I'm sure I can fix this instance of the = problem by dropping and re-creating the table, but this does not address = the larger problem; rowid's should NEVER change. Has anyone else experienced this? Thanks in advance PS Please no lectures on how the use of rowid's is not supported. I am = aware of the implications of using rowid's, I'm more concerned about why = the engine is doing this and if it might be a symptom of larger problems = to come.