invalid string enlargement request

Not sure if this is a JDBC or general Postgres question, but we're
losing a web app's connection to Postgres with these errors:

invalid string enlargement request size 1358954494
AbortTransaction and not in in-progress state
invalid frontend message type 41

This is with Postgres 7.4.7 and driver pg74.213.jdbc3.jar.

Anybody have any ideas?  Should I take this to the general list?

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____________________________________________________________
Glenn Holmer                          gholmer@weycogroup.com
Software Engineer                        phone: 414-908-1809
Weyco Group, Inc.                          fax: 414-908-1601