Yes, you are reading it correctly, an updater for DW MX2004 has came out and this is what they fixed:
- Performance improvements.
- Stability improvements.
- Timelines: The timelines feature, available in Dreamweaver MX but not in Dreamweaver MX 2004, has been restored.
- Opening files with no specified character encoding.
- Updated ColdFusion Reference help.
More info, in the release notes.
Grab the updater here.