'a' = any( $${'a','x'} )

jasen=# select 'a' = any( $${'a','x'}$$ ) ;
?column?
----------
f
(1 row)

I expect it to be true instead. what am I doing wrong?

PostgreSQL 8.3.7 on i486-pc-linux-gnu, compiled by GCC gcc-4.3.real (Debian 4.3.2-1.1) 4.3.2

jasen.