problem with memory

Hello

one czech PostgreSQL user reports problem with memory - probable memleak?

Is possible to diagnose some from log?

Postgres  ver. 8.3.7 .
Server 8G RAM,  32b Debian Etch.

Configuration:
shared_buffers = 324000        # min 16 or max_connections*2, 8KB each
temp_buffers = 16000            # min 100, 8KB each
work_mem = 8126            # min 64, size in KB
maintenance_work_mem = 16384        # min 1024, size in KB
max_stack_depth = 7680            # min 100, size in KB
max_fsm_pages = 200000            # min max_fsm_relations*16, 6 bytes
max_fsm_relations = 12000        # min 100, ~70 bytes each
effective_cache_size = 300000        # typically 8KB each

http://jyxo.cz/misc/sql.error.txt

Thank you
Pavel Stehule