I get this warning also when writing a new page. I have installed the static homepage-plugin, but I dont think that matters, does it?
Great, installed that and it works fine 🙂 Thank you very much for the hint!
Since I installed this more than needed mod (thanx a lot!) there is the following warning message, when i.e. editing a post:
Warning: Invalid argument supplied for foreach() in /www/htdocs/abcdefghjikl/wordpress/wp-admin/admin-functions.php on line 617
Any ideas?
Would it be difficult to not let the menu be removed when viewing a single post? Which files do i have to look at for realizing that?