Also this message has shown up:
Warning: Cannot modify header information – headers already sent by (output started at /home/content/b/l/u/bluecaveAdmin/html/wordpress2/wp-includes/widgets.php:76) in /home/content/b/l/u/bluecaveAdmin/html/wordpress2/wp-includes/pluggable.php on line 890
YIKES!!!
D
I figured it out by reading other posts – Turn off ALL plugins and then turn them back on 1 at a time to see which are compatible w/3.0
Thanks Forum!
DG
I have and had this problem across any and ALL themes, after activating an RSS feed widget. I removed each and every (all!) widgets. Still had both the subject error plus a “cannot update header” error.
Another forum solved the second (header) issue,
but still stuck with the Warning: Missing argument 2 for wp_widget().
SOLVED it by renaming (erasing) the new widget’s folder from the wp-content/plugins folder
