Many other forums have a Preview button which allows the user to view what the post will look like prior to actually submitting the post on the thread.
I'm not suggesting that the rule that a post can be edited only for one hour be changed. But I think many users would find it helpful to preview a post (for example when one is posting a FEN) and make the necessary corrections before actually posting rather than after.
This enhancement was explicitly suggested a long time ago in the Help forum:
[threadid]http://www.redhotpawn.com/board/showthread.php?threadid=7220[/threadid]
Other posts (in unrelated to the threads) have also mentioned it as a nice site improvement, for example:
[threadid]http://www.redhotpawn.com/board/showthread.php?threadid=44711[/threadid]
[threadid]http://www.redhotpawn.com/board/showthread.php?threadid=9831&page=3[/threadid]