Invalid use of \\ in string literal from postgresql

[Graham Murray]

I am using spamassassin 3.2.0 and Postgresql 8.2.4 for bayes and awl.

I am seeing several messages from Postgresql like the following

spamd[18408]: WARNING: nonstandard use of \\ in a string literal
spamd[18408]: LINE 1: select 
put_tokens(1,'{"\\\\003\\\\272\\\\260\\\\274\\\\052"...
spamd[18408]:  ^
spamd[18408]: HINT: Use the escape string syntax for backslashes, e.g., E'\\'.

In both /var/log/mail (where these are pasted from) and the postgresql logs.