wp-tags gets unexpected warning in wp-blog-header

[gzfelix]

Warning: extract(): First argument should be an array in
/path/to/wp/wp-blog-header.php on line 175

This repeats around 20 times down the page and then it gives this:

Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to
allocate 46080 bytes) in
/pat/to/wp/wp-blog-header.php on line 40

The user is using PHP 4.3.10, safe mode, MySQL 3.23.