Hello kg0224,
This behavior has been corrected in the Spring '10 release, currently slated for March 13th. The predecessors were appearing in the Outline View, but not in the Gantt Chart view, and as you stated, took a task edit and save to appear back. With the new release, task predecessors will show up in both Outline and Gantt views immediately.
Tom Yang | Support Specialist
Daptiv, Inc.
1008 Western Ave., Suite 500 | Seattle, WA 98104