Im not sure if this has been discussed to death already but it seems that the current functionality for auto choosing the thumb to be displayed when browsing posts in the list format is taken from the first image found in the firsts posts.
So the trend now it seems is to edit the first post because it then updates the thumb. I just did it myself for the first time while participating in BC robot competition and just now a few minutes ago saw a new entry where the user explicitly mentions he will be using the first post block for all latest updates.
Basically this could also be because of the incorrect default choice for sort order in a thread. The manner in which we consume information in non blog/forum situations like facebook, twitter etc is to provide the most current information first.
I know its not just this forum but most of them all over the internet list by date from oldest to newest and yet logic tells me I want to know the most current news/state of any thread first … and should I feel the need to backtrack for more info then I will
any thoughts …would a change in this functionality be possible or are we just going to have to keep editing the first post to make it work the way we want?