Current CVS has strange parser for float type

wow=# select 5.3::float;
ERROR: Bad float8 input format '5.3'
wow=# select 5.3::float8;
ERROR: Bad float8 input format '5.3'
wow=# select 5.3::float4;
ERROR: Bad float4 input format '5.3'
wow=# select 5.3e-1::float4;
ERROR: Bad float4 input format '0.53'
wow=# select -5.3e-1::float4;
ERROR: Bad float4 input format '0.53'
wow=# select -5.3::float4;
ERROR: Bad float4 input format '5.3'
wow=# select 5.32222e2::float4;
ERROR: Bad float4 input format '532.222'
wow=# select version();
version
---------------------------------------------------------------------
PostgreSQL 7.3b2 on i386-unknown-freebsd4.6, compiled by GCC 2.95.3
(1 row)

Very strange or I missed something?
This 'feature' appears only on FreeBSD, Linux works fine.

--
Teodor Sigaev
teodor(at)stack(dot)net