I had a simple application that worked using Rails 0.12.1 and when I run it on 0.13.1 I have a problem with validation. Previously the validates_presence_of : statement in my model worked, but with 0.13.1 it doesn''t seem to allow a zero to be entered. Has something changed in the new version so I have to explicitly allow a zero entry or is something else possibly going on. I even set up a new project...only scaffold and a single table, added in the validates_presence_of : statement and I get the same thing again...doesn''t allow zero to be entered. I''m puzzled and it''s probably something really stupid I''m doing, but... Thanks for helping a slightly confused rails novice! David.