What version are you running? 1.7.5 What's the URL of the page containing the problem? not available to the public, internal only. What steps will reproduce the problem? 1.go to url 2.login with user credentials (Argentina user) What is the expected output? What do you see instead? Normally the user sees their open/closed review requests. Instead we get: ""Something broke! (Error 500) It appears something broke when you tried to go to here. This is either a bug in Review Board or a server configuration error. Please report this to your administrator."" Instead What operating system are you using? What browser? Google Chrome/Windows 7 Google Chrome Mac OS X Please provide any additional information below. running reviewboard on CentOS release 6.3 (Final) 32 bit. I am the administrator and I get the following error email message. Notice the Time Zone Error: Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/Django-1.4.3-py2.6.egg/django/core/handlers/base.py", line 89, in get_response response = middleware_method(request) File "/usr/lib/python2.6/site-packages/ReviewBoard-1.7.5-py2.6.egg/reviewboard/accounts/middleware.py", line 13, in process_request timezone.activate(pytz.timezone(user.timezone)) File "/usr/lib/python2.6/site-packages/pytz-2012j-py2.6.egg/pytz/__init__.py", line 185, in timezone raise UnknownTimeZoneError(zone) UnknownTimeZoneError: 'America/Argentina/Me' This has been working for years. Let me know if this raises any flags for anybody.