PHP safe mode
reading up on the details here:
http://kb.mediatemple.net/display/2n/kb/article.asp?aid=10059
and here:
http://kb.mediatemple.net/display/2n/kb/article.asp?aid=10094&n=1&s=1
here, too:
http://kb.mediatemple.net/display/2n/kb/article.asp?aid=10136&n=2&s=1