Index: org/postgresql/core/v3/SimpleParameterList.java
===================================================================
RCS file: /usr/local/cvsroot/pgjdbc/pgjdbc/org/postgresql/core/v3/SimpleParameterList.java,v
retrieving revision 1.14
diff -c -r1.14 SimpleParameterList.java
*** org/postgresql/core/v3/SimpleParameterList.java	13 Jun 2007 07:25:01 -0000	1.14
--- org/postgresql/core/v3/SimpleParameterList.java	20 Sep 2007 17:26:42 -0000
***************
*** 64,69 ****
--- 64,72 ----
          if (oid == Oid.UNSPECIFIED && paramTypes[index] != Oid.UNSPECIFIED && value == NULL_OBJECT)
              return;
  
+         if (oid == Oid.UNSPECIFIED)
+             throw new IllegalArgumentException("Unspecified type comes from here, parameter: " + (index+1));
+ 
          paramTypes[index] = oid;
      }