Internal Error on 'vacuum full'

Hi,

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After dropping some tables in my PG 8.3 DB I tried to execute 'vacuum
full' command and got the error:

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ERROR: invalid memory alloc request size 4294967280

SQL state: XX000

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Up to now the error has not reproduced once again.

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select version();

"PostgreSQL 8.3.0, compiled by Visual C++ build 1400"

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Sergey Zubkovsky