Error creating a new thread

While trying to create a new thread I got this error:

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 72 bytes) in /var/www/sites/all/modules/content/cck/includes/views/handlers/content_handler_field_multiple.inc on line 184

As I tried to preview this very post I got the following error:

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 72 bytes) in /var/www/includes/database.mysqli.inc on line 161

looks like the forum updates yesterday broke the preview. fixed now.