[galaxy-dev] server error from history view while setting [debug=False]

Dear all, When I check a new copy of galaxy source code(may 1st) and set [debug=False] in the universe_wsgi.ini, the history panel of the web UI can not be displayed properly. It says "server error". I did some searchings and find a thread http://gmod.827538.n3.nabble.com/Server-error-from-history-view-td1009053.ht.... According to the thread, i think it is a problem long time ago. I don't know why it happens again. Anyone can tell me how to resolve the problem? I also tried the latest repository of galaxy-central. No luck either. Shall i just leave [debug=True] until the bug has been fixed. Thanks, Tyler