Wikimedia Bugzilla is closed!

Created attachment 6232 [details]
Screen shoot of the message

Global default default is invalid for field date

Backtrace:

#0 /usr/local/apache/common-local/php-1.5/includes/Preferences.php(1050): Preferences::getPreferences(Object(User))
#1 /usr/local/apache/common-local/php-1.5/includes/specials/SpecialPreferences.php(44): Preferences::getFormObject(Object(User))
#2 /usr/local/apache/common-local/php-1.5/includes/SpecialPage.php(559): SpecialPreferences->execute(NULL)
#3 /usr/local/apache/common-local/php-1.5/includes/Wiki.php(233): SpecialPage::executePath(Object(Title))
#4 /usr/local/apache/common-local/php-1.5/includes/Wiki.php(62): MediaWiki->initializeSpecialCases(Object(Title), Object(OutputPage), Object(WebRequest))
#5 /usr/local/apache/common-local/php-1.5/index.php(116): MediaWiki->initialize(Object(Title), NULL, Object(OutputPage), Object(User), Object(WebRequest))
#6 /usr/local/apache/common-local/live-1.5/index.php(3): require('/usr/local/apac...')
#7 {main}

checked with two accounts (MichaelFrey and Sundance_Raphael)