Permissions issue…?

The errors copied below appear in the Page Attributes box on the Add/Edit Page page. I am using the Twenty Ten theme, which these messages seem to reference.

I did manage to find a support topic where someone was receiving similar messages in relation to a plug-in, but I’m afraid the solution went mostly over my head.

There is no real affect on the site itself (juliebozza.com) when it’s available. However I am starting to get server overload issues, and having run through some other solutions, I am wondering if these errors are contributing.

Can someone please help? I am OK in dealing with WYSIWIG interfaces, but when it comes to the ‘behind the scenes’ coding, I am still very much learning.

Thank you in anticipation!

Warning: scandir(/home/juliebozza/juliebozza.com/wp-content/themes/twentyten/log) [function.scandir]: failed to open dir: Permission denied in /home/juliebozza/juliebozza.com/wp-includes/class-wp-theme.php on line 978

Warning: scandir() [function.scandir]: (errno 13): Permission denied in /home/juliebozza/juliebozza.com/wp-includes/class-wp-theme.php on line 978

Warning: Invalid argument supplied for foreach() in /home/juliebozza/juliebozza.com/wp-includes/class-wp-theme.php on line 981