Fatal error:....wp-inst/wp-includes/functions.php on line 2385

One of my user blog suddenly got the following error when trying to open his blog.
Fatal error: Only variables can be passed by reference in /var/www/XXXXXXXXX/wp-inst/wp-includes/functions.php on line 2385

I checked the line 2385 and it's about cron entry i guess. I logged in as admin and edit the blog to view the settings and noticed there are some settings about cron. Other users blog is running fine..Anyone had similar problem?