Errors after update

On page editor:

Warning: file_get_contents(/nfs/c10/h01/mnt/141910/domains/seatoskycelebrations.com/html/wp-content/themes/dandelion_v2.6.7/functions/timthumb.php) [function.file-get-contents]: failed to open stream: Permission denied in /nfs/c10/h01/mnt/141910/domains/seatoskycelebrations.com/html/wp-includes/class-wp-theme.php on line 953

I have tried to chmod the file through ftp client and permission is denied.

Errors upon clicking update on a page in the page editor. The page still updates it appears, not sure what is causing this.:

Warning: file_get_contents(/nfs/c10/h01/mnt/141910/domains/seatoskycelebrations.com/html/wp-content/themes/dandelion_v2.6.7/functions/timthumb.php) [function.file-get-contents]: failed to open stream: Permission denied in /nfs/c10/h01/mnt/141910/domains/seatoskycelebrations.com/html/wp-includes/class-wp-theme.php on line 953

Warning: Cannot modify header information – headers already sent by (output started at /nfs/c10/h01/mnt/141910/domains/seatoskycelebrations.com/html/wp-includes/class-wp-theme.php:953) in /nfs/c10/h01/mnt/141910/domains/seatoskycelebrations.com/html/wp-admin/post.php on line 235

Warning: Cannot modify header information – headers already sent by (output started at /nfs/c10/h01/mnt/141910/domains/seatoskycelebrations.com/html/wp-includes/class-wp-theme.php:953) in /nfs/c10/h01/mnt/141910/domains/seatoskycelebrations.com/html/wp-includes/pluggable.php on line 1121