Forcing Function Recompilation In SQL 2000

A stored procedure in the cache is automatically recompiled when a table it refers to has a table structure change. User defined functions are not. Here's a simplified code sample:

set nocount on
go

create table tmpTest (a int, b int, c int)

insert into tmpTest (a, b, c) values (1, 2, 3)
insert into tmpTest (a, b, c) values (2, 3, 4)
go

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[fTest]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[fTest]
GO

CREATE FUNCTION dbo.fTest (@a int)
RETURNS TABLE
AS
RETURN (SELECT * from tmpTest where a = @a)
GO

select * from fTest(1)

CREATE TABLE dbo.Tmp_tmpTest
(
a int NULL,
b int NULL,
d int NULL,
c int NULL
) ON [PRIMARY]
IF EXISTS(SELECT * FROM dbo.tmpTest)
EXEC('INSERT INTO dbo.Tmp_tmpTest (a, b, c)
SELECT a, b, c FROM dbo.tmpTest TABLOCKX')
DROP TABLE dbo.tmpTest
EXECUTE sp_rename N'dbo.Tmp_tmpTest', N'tmpTest', 'OBJECT'

select * from fTest(1)

drop table tmpTest

Running it, the output is:

a b c
----------- ----------- -----------
1 2 3

Caution: Changing any part of an object name could break scripts and stored procedures.
The OBJECT was renamed to 'tmpTest'.
a b c
----------- ----------- -----------
1 2 NULL


(I know that "select *" is bad, but it's a lot of legacy code that I'm working with here, and that's how it's written.)

The function doesn't detect that the table has changed in structure, or even that there is no longer a dependency on tmpTest. (Appending a column rather than inserting has the same effect, in that only the first 3 columns are returned.)

DBCC FREEPROCCACHE has no effect, not that I really expected it to, but you never know...

Is there any way, other than dropping and recreating, to force a recompilation of a particular function in memory, or perhaps all functions?

Thanks in anticipation.

Tom