First, I am sorry users have to even deal with this issue. It's not good and I want to fix the problem asap. But first let's talk about how to get your posts back.
I'm using a new technique for storing user data, and it's a good one, but I'm still learning how it works, and fixing mistakes.
Choose Restore from Backup from the Feed menu.
A confirmation dialog appear telling how many posts it was able to recover. If the number sounds right, click OK, and your posts will reappear in the History table.
Please post a comment here, saying it happened. I want to know.
If you have more than 25 posts, and it reports it was able to restore 25, don't worry, that's all you need to restore, because it's using those posts to build your feed. We are maintaining an archive that goes back before the feed start point.
Early in the life of Radio3 if there was an error getting your "prefs" from the server, you'd start over with a fresh setup. The next time you made a change, which usually was right away, the new empty data would overwrite the data on the server, and poof all your posts would be gone. This was terrible. It happened to me a couple of times, and the feeling was awful. I resolved to get to the bottom of it, and I think I have, and now I believe Radio3 works as it's supposed to.
And even if it were to happen again, there's a pretty good chance we can get them back, because we're backing up the data independent of the "prefs" file. Eventually I want to switch to the backup method because even though it's a little slower, it's more reliable.