Exact same problem here.
Fresh install. Client did it, I was consulted, I had the problem repeat on me.
up to date Zend Optimizer
any clues here?
Edit for Additional info.
From the error log - The first occasion of an error there looks to be
PHP Warning: preg_match() expects parameter 2 to be string, array given in /home/webname/public_html/blog/wp-admin/
upgrade-functions.php on line 273
I get nine or so of those in a row, and then a repeat of the same error on the same page at
for about 30 or more times, and then again for
for about 25 times
and then the whole thing bails with:
PHP Fatal error: Call to undefined function: array() in /home/webname/public_html/blog/wp-includes/
functions.php on line 1129