Can't locate object method "check_body_length" via package "Mail::SpamAssassin::PerMsgStatus"

[jidanni]

Help. sa-update is jammed.
What should I do?

rules: failed to run __KAM_BODY_LENGTH_LT_256 test, skipping:
        (Can't locate object method "check_body_length" via package 
"Mail::SpamAssassin::PerMsgStatus" at (eval 1114) line 419.

etc. etc.