BUG #3115: backend died abnormally HELP!!

The following bug has been logged online:

Bug reference: 3115
Logged by: Bryan O'Neill
Email address: smartalarm(at)mindspring(dot)com
PostgreSQL version: 7.2.3
Operating system: Redhat 8.0
Description: backend died abnormally HELP!!
Details:

On 3/4/07, I received the following message from the subject pc:
"NOTICE: Message from PostgreSQL backend:
The Postmaster has informed me that some other backend
died abnormally and possibly corrupted shared memory.
I have rolled back the current transaction and am
going to terminate your database system connection and exit. Please
reconnect to the database system and repeat your query." I think this
happened on 1/27/07 also but I don't recall getting the error message
although I could not access the database until after a cold restart. This
pc has run postgresql without any trouble since Nov. 2003, until the last
few weeks. One other thing I note was that the /var partition was 98% full!
I think this may have been the source of the error. How can I be sure?
Please advise. Thanks in advance,