since 3.9.1 – saving post gets error messages

Hi
Since uploading 3.9.1 whenever I create a new post, save, publish, or edit I get the below error messages (they vary). I can then back the browser to get back to the post and hit the restore back-up version to allow me to continue to edit etc.

I have tried removing the plugins but nothing has changed this.
https://www.thatcreativefeeling.com
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Notice: Undefined offset: 0 in /home/thth3970/public_html/wp-includes/capabilities.php on line 1102
Warning: Cannot modify header information – headers already sent by (output started at /home/thth3970/public_html/wp-includes/capabilities.php:1102) in /home/thth3970/public_html/wp-admin/post.php on line 235
Warning: Cannot modify header information – headers already sent by (output started at /home/thth3970/public_html/wp-includes/capabilities.php:1102) in /home/thth3970/public_html/wp-includes/pluggable.php on line 1121
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Plus all of sudden today my blog spewed out a lot of header errors, I have deactivated several plugins to allow it to have a normal view and I tried re installing 3.9.1, nothings changing.

Hope someone has a suggestion!
thanks