Well... I actually posted that it was solved, because in a lesser sense, my problem was solved. What happens is a certain (of some sort, yet not just one) scripting error repeatedly shoots off error messages. This rapid and repeated shooting of error messages overruns the message buffer (Think "Buffer Overrun", iirc). So that the game doesn't crash, and least affects the player as possible, the message system finally shuts down temporarily, and then later does checks to see if it's done spitting out tons and tons of error messages. It seems that most of the time, people that have experienced what I have experienced have a scripting error that eventually stops shooting off error messages.
I'm on 310+ days now (previously 126 when I first experienced the bug). I've experienced this bug now at least 4-5 times. Each time, my messages were shut off, and over time, were eventually restored. Generally speaking, messages were restored about a little under an hour and a half max, but usually 20-30 mins of play. This is a guess at the moment, but I think the more you go out and get in fights with enemies roving about the overmap, the quicker it is that you'll clear the buffer overrun.
I've also found that this error, whatever the true scripting error may be, is inevitable in a sense (As I've done saving and re-loading also, along with multiple saves), and so leads me to believe that it has to do with the games advanced behind-the-scenes scripts not calculating certain things right.
So, I'm going to assume, bigchief, that you're .960, and that your save came out of a .960 game. If you want, when your feedback dissapears, you can go to the log window (I think Q will go to the menu that will lead to the "Game Log" tab? It's a bit late and I'm away from my game computer right now), and this will keep spitting out, REPEATEDLY, what error you're recieving. You might be able to find out if it's the same error the next time it pops up.
In essence, in the end, this dissapearing feedback error isn't one error, but simply a symptom of many different errors. For it to be fixed, my guess is that you'd have to fix all the scripting errors in the game, or simply modify the base output section of the engine to differentiate error message feedback and normal game feedback into two different sections.
My solution is, once again, keep playing until it goes away, and suffer through it. For me, it doesn't pop up -that- often, but maybe I'm getting less scripting errors than you.
Comments, anyone?
Disclaimer: This post was written at 1AM, heh.