timeofday() and clock_timestamp() produce different results when casting to timestamptz

Hi all,

Today after upgrading to 9.2 from 9.0 I faced a very odd
incompatibility that seems to me as a bug:

smoking_test=# select timeofday(), clock_timestamp();
timeofday | clock_timestamp
-------------------------------------+-------------------------------
Sat Mar 23 11:20:54.023796 2013 MSK | 2013-03-23 11:20:54.023815+04

smoking_test=# select timeofday()::timestamptz, clock_timestamp()::timestamptz;
timeofday | clock_timestamp
-------------------------------+-------------------------------
2013-03-23 12:21:03.995653+04 | 2013-03-23 11:21:03.995695+04

As you can see after casting timeofday() to timestamp with time zone
it adds one hour to the timestamp when clock_timestamp() behaves
normally.

Timezone is Europe/Moscow. Version information:

smoking_test=# select version();
version
---------------------------------------------------------------------------------------------------------------
PostgreSQL 9.2.3 on x86_64-unknown-linux-gnu, compiled by gcc (GCC)
4.1.2 20080704 (Red Hat 4.1.2-52), 64-bit

--
Sergey Konoplev
Database and Software Architect
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