There is a 3 day time limit on editing posts.
The error timing out when editing long posts is due to the forum censor function (used to block spam; unfortunately, there is no way to only have it applied to new user accounts). I went through the censor list and cleared out some of the entries no longer needed, so that should help a bit.
I can combine the posts if you wish, or you can PM me with anything to add to the OP or replace it with.
