Cascade Server 6.4.5 is a bug fix release and a recommended upgrade for all clients.  It addresses a number of issues related to creating/editing assets containing XML/XHTML content and also addresses security vulnerabilities.

Issues Resolved

Bug

• [CSCD-4101] - Template conversion process strips <div> tags
• [CSCD-6511] - Formats that link to other formats don't work when used across Sites
• [CSCD-6514] - Non-breaking space characters introduced into content after clicking Back in Start Workflow screen
• [CSCD-6626] - Security vulnerabilities in Dashboard, Browse, Login and Open actions
• [CSCD-6668] - Javascript highlights all roles, users, and groups during Site Migration

Please follow every available release Upgrade Guide for every version you skipped during the upgrade.