Gotcha. I was curious about what is preventing someone from making changes to other people's notifications.

edit:
One thing I noticed is the use of "Today" in quotes. If someone quotes my message the day I post it, my notification page will reflect "today" in the quote header, even if I am reviewing my notification page several days from now.

Perhaps you can review the 'quoteheader' div tag for the word "Today" and replace the word "today" with the current date.

I am unable to view the 'edited posts' part of your site, but my presumption is that there is a similar issue with that project as well.