Topic: Wordpress Error codes

I am getting this in Firefox after I update my profile photo...  Warning: Cannot modify header information - headers already sent by (output started at /home/gsft/public_html/wp-content/plugins/all-in-one-seo-pack/aioseop.class.php:221) in /home/gsft/public_html/wp-content/plugins/jl-punbb.php on line 75

BTW....have you tried YOAST SEO versus all in one?