Bah, why must I suck at spelling :-p

manual/new/docs/en/object-relational-mapping/introduction.txt

@@ -40,4 +40,4 @@ class Email extends Doctrine_Record {
 }
 </code>
 
-Note that validators / column constraints and the column length fields are optional.  The length may be omitted by using **null** for the length arguement, allowing doctrine to use a default length and permitting a fourth arguement for validation or column constraints.
+Note that validators / column constraints and the column length fields are optional.  The length may be omitted by using **null** for the length argument, allowing doctrine to use a default length and permitting a fourth argument for validation or column constraints.