Error: Panic

Hi folks. I have Postgresql running with Freeside. Yesterday I got this
error. Someone can give me some light about the subject, please?

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POSTGRESQL BUG REPORT TEMPLATE
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Your name : Javier V.
Your email address : smetafora(at)hotmail(dot)com

System Configuration
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Architecture (example: Intel Pentium) : i586

Operating System (example: Linux 2.0.26 ELF) : Linux RedHat 7.2

PostgreSQL version (example: PostgreSQL-7.3.2): PostgreSQL-7.3.2

Compiler used (example: gcc 2.95.2) : gcc 2.96D

Please enter a FULL description of your problem:
------------------------------------------------
The data directory seems to be corrupted. This is the error that I got:

= = = = = = = = = = = = = = = = = = = = = = =
LOG: database system was interrupted at 2003-07-02 16:48:43 PYT
LOG: ReadRecord: record with zero length at 0/7F4C3E8
LOG: invalid primary checkpoint record
LOG: ReadRecord: record with zero length at 0/7F4C3A8

PANIC: unable to locate a valid checkpoint record
LOG: startup process (pid 1081) was terminated by signal 6
LOG: aborting startup due to startup process failure

= = = = = = = = = = = = = = = = = = = = = = =

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