User had it's name changed through "Rename" feature in user management and now appears as "Deleted User" on Reviews
Symptoms
The particular user had it's name changed through "Rename" feature in user management and now he appears as "Deleted User" on all Reviews he is the owner or the participant.
Cause
This is probably caused because Crucible didn´t picked up the changes of the particular user yet.
Resolution
Follow the instructions in the following knowledge base article:
How to re-index Crucible review data
If this option doesn´t solve your problem, please login into http://support.atlassian.com and open a new issue so one of our Support Engineers can take a look.