What version are you running?
1.0.4

What's the URL of the page containing the problem?
http://<site>/reviews/admin/db/reviews/reviewrequest/

What steps will reproduce the problem?
1. Create new review request, upload DIFF.
2. Do not fill any field on the review request form.
3. Press the Discard button.
4. Switch to Review Board administration interface.
5. Go to Database -> Reviews -> Review requests.
6. Find unnamed discarded review request and try to view or delete it.

What is the expected output? What do you see instead?
Expected result: Review request is opened/deleted.
Actual result: "Something broke! (Error 500)" message.

What operating system are you using? What browser?
Windows, Mozilla Firefox 3.5.3