REGEXP_LIKE

 Position of dot in NOT REGEXP_LIKE(COL3, '[^[:digit:]()+-.surprisingly significant.

SQL*Plus: Release 10.2.0.5.0 - Production on Fri Apr 22 16:18:41 2011
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SQL> CREATE TABLE reg_exp_test(
  col1  VARCHAR2(10 BYTE),
  col2  VARCHAR2(10 BYTE),
  col3  VARCHAR2(10 BYTE)
);
Table created.

SQL> ALTER TABLE reg_exp_test ADD (
  CONSTRAINT col1_ck
 CHECK (NOT REGEXP_LIKE(col1, '[^.[:digit:]()+-]')));
Table altered.

SQL> ALTER TABLE reg_exp_test ADD (
  CONSTRAINT col2_ck
 CHECK (NOT REGEXP_LIKE(col2, '[^[:digit:].()+-]')));
Table altered.

SQL> ALTER TABLE reg_exp_test ADD (
  CONSTRAINT col3_ck
 CHECK (NOT REGEXP_LIKE(col3, '[^[:digit:]()+-.]')));