Hi Sheldon, when looking at the BPM Suite and BRMS Installation Guides V6.4 on the Customer Portal, I notice that they both incorrectly reference V6.3 on the title pages. For example, on the title page of the BPM Installation Guide:
https://access.redhat.com/documentation/en-us/red_hat_jboss_bpm_suite/6.4/html/installation_guide/, the following string displays above the list of authors:

RED HAT JBOSS BPM SUITE 6.3 INSTALLATION GUIDE FOR RED HAT JBOSS ADMINISTRATORS

This issue affects both the HTML and PDF versions of BPM Suite and BRMS Installation Guides 6.4. Let me know if you have any questions for me!