Spycoo16 Well, this has been interesting. I downloaded your build (using Add to Game) and installed it, and went to place it in an essentially new save in Sunset Valley... and got an almost instant crash to desktop. So I tried again with a different, larger lot, and it was fine until I told the game to push it to the front of the lot, when I got another CTD. This doesn't mean your lot is broken—I was testing with the 64-bit Mac version of the game.
What I was intending to test was whether the lot description would be present once I'd placed the build, and it was not (on the third try, with no attempt to move or recenter the build). So I tried again using the Save File button, and I got the same results.
I'm not sure why the description disappeared. Is this true for every lot or just some? If you move the Library files from your old Sims 3 folder into a new folder (not the one you're testing with now), do the descriptions show up? What about if you grab the contents of Downloads from the old folder? And for that matter, do the Library files from your old folder have exactly the same names and sizes as what you get when you install your content fresh? If you have too many files to test, don't bother, but if you only have a few, it would be interesting to see.
Finally, try opening a fresh download with CUSTARD to see whether the lot description appears at all. And test some of your older downloaded Sims3Packs as well.