Yes, same issue
after update to 1.4.18, filling my server disk with gigs of error in apache error log ( in few seconds ) :
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[Sat Sep 21 07:49:04 2013] [error] [client 66.249.78.171] PHP Warning: current() expects parameter 1 to be array, integer given in ../wp-includes/plugin.php on line 404
[Sat Sep 21 07:49:04 2013] [error] [client 66.249.78.171] PHP Warning: next() expects parameter 1 to be array, integer given in ../wp-includes/plugin.php on line 408
…
repeatly
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I roll back to the Yoast SEO 1.4.15 and everything is ok now.
Regards