I try to maintain a "FAQ" by editing the first post of a thread with all of the relevant information in the thread so that people don't have to read through the whole thing and have to wade through outdated and incorrect information. This is the thread in question. Several months ago the Edit button disappeared and I was unable to edit the first post any more. I thought maybe there was a simple expiration on edits, and that over the years I must have hit that expiration date. But then a couple of months later, the Edit button mysteriously reappeared and I was able to make changes again. Fast forward to today, and now the Edit button is gone yet again. I am left wondering when it will reappear again. Considering the timeline involved, this has happened to me on both the old and new forum software. I am also not the only person to have this happen to them. Here is an example. So what the heck is going on? Why are there these on-again off-again windows of opportunity to edit old posts?