Project 2010 - Disappearing Task Names

I have a Project Professional 2010 (using Server 2010) file that has task names that disappear.  These are tasks with Resources, durations, sometimes completed, sometimes just have some work against them, sometimes no actual work yet.  When you open the schedule and double click on the task all the Task Information, except the name, appear as expected.  The task level (WBS level) is also maintained and the "+" or "-" sign will display even though the task name is blank.   It appears to happen randomly but MIGHT happen more often after an update is accepted.