I just upgraded to WordPress 2.9 and my sidebar RSS feed widgets are not working. When I try to install them, I get two errors:
RSS Error: The data could not be converted to UTF-8
Fatal error: Call to undefined function: __destruct() in /home/content/.../wp-includes/default-widgets.php on line 735
Furthermore, the error causes any other widgets below it to quit working as well.
The feeds in the dashboard are not working either (incoming links, WordPress development blog, Other WordPress news). I'm getting the same UTF error that I got for the widgets: RSS Error: The data could not be converted to UTF-8
Thanks in advance for any help.