I have had a similar problem. I am around level 14/15, near Giliad.
After the patch (this AM) I noticed the problem. For me, it has occurred a few ways. When I first noticed it, I reloaded and was playing normally for about an hour. Now, it has cropped up again and I have noticed that it is now difficult, if not impossible, to actually eliminate.
It seemed to be occurring at random the second time. I would load games minutes before where it wasn't happening and do things differently, and it would still crop up within 3-5 minutes. After playing around with it, it seems to me that opening the journal is certainly one thing that always causes the texts to disappear.
At one point during the second round of this happening, I found that I could level normally. I would get the text and indicator that I could level. I would open my journal, raise my stats and get the learning points. After that, without fail, the texts were gone (whether it be about EXP, save status, levels, quests, etc.)
Now, it seems to have gotten worse after playing things differently to see if it went away. Now, it doesn't even tell me when I leveled. It does seem to give me learning points, but it does not give me the option to get stat points. I can open the journal and see that I got experience points to hit 15th level and - as I said - my learning points increase, but I never get to raise stats (not a big deal, but annoying regardless.)
Interestingly enough, when this began to occur, I reloaded games that happened after I had gotten a new level (and it indicated that in text) but BEFORE I opened the journal. Only now, when I load them, it doesn't even indicate that I had leveled (in text, or on my journal). If I do click on the journal, I can see by my EXP I have leveled, but it does not prompt my stats to go up. It does seem as though I am getting learning points though.
So, it is an odd glitch, and seems to be getting worse?
As others have said, this isn't show-stopping, but not being regularly alerted that quests have updated, not being able to see the EXP you are getting for certain kills, not seeing quest EXP, etc....and having to check often to see how close to leveling I am....it's all just annoying. Not game-breaking, but very frustrating.
As others have said, great game and an amazing TC (way better than TES: Oblivion IMHO), and bugs like this are bound to happen, but it is annoying for such a small glitch. That it seems to be getting worse has me concerned to play much more for fear that it might get even worse than it is (like affecting levels and EXP in general, etc.) I doubt this would happen, but still....
Thanks for the help and the game.