I use WordPress MS version 3.0.3 with 5000+ blogs and plus WP-Super Cache installed. This error seems a bug.
I am getting this error:
Warning: Cannot modify header information - headers already sent by (output started at /home/xxx/public_html/wp-content/plugins/google-sitemap-generator/sitemap-loader.php:2) in /home/xxx/public_html/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 78
LMK how to solve this please.