If you’ve upgraded to WordPress 3.0 and are using the Thesis Theme for WordPress, you might already have discovered the use_codepress fatal error which looked like this when I selected the Custom File Editor under Thesis Options a few minutes ago:
Fatal error: Call to undefined function use_codepress() in /.../public_html/wp-content/themes/thesis_16/lib/admin/admin.php on line 57
The fix is simple.
if (use_codepress()) add_action('admin_print_footer_scripts', 'codepress_footer_js
// if (use_codepress()) add_action('admin_print_footer_scripts', 'codepress_footer_js');
You’re just commenting out the offensive code with the //.
Granted, you’ll lose the syntax highlighter in your Custom File Editor, but DIYThemes should have a fix for that with the official release of 1.7, which is now in BETA.
BTW, RosalindGardner.com runs of the Thesis theme.