Edit limits enabled
I've just installed a module to set time limits on edits for both forum topics and comments. It is set so that you can only edit a post within 3 days. After that editing will not be allowed.
We have had some problems in the past with people going back and adding spammy links to old posts. This will prevent them from being able to do that.
If there is some legitimate reason why you need to be able to edit a post after more than three days, please post a comment and a moderator will make the edit for you.