There's a new command in the Feed menu in Radio3, that does automatically what I've been doing for people manually, it restores your posts from the backups that we're keeping.
Now, this is not something to do casually, because it's not well-tested (really hard to test this) and the data might not be complete. If everything's going well, leave well enough alone.
However it does confirm the replacement, so you can use the command to see if we have a good backup for your posts. It tells you how many it has.
Also it will never return more than 25 posts, because that's the max size of the history table.
Dave