[wp-testers] PHP4 compatibility bug?

[Adrian Walmsley]

Because I was having problems with my PHP4 hosted 3.1 test site after
upgrading to 3.1 RC2, I discarded it and reinstalled using the latest
nightly build.

Now I get the error message
*Fatal error*: Call to undefined function: array_intersect_key() in *
/home/compton/public_html/web/wp-admin/includes/class-wp-list-table.php* on
line *274*


and I believe array_intersect_key()is new in PHP5.