I had created folders for my List to hold older items. I did this to manage the threshold and so they would still be included in a search query. I just noticed that the folders are empty but I know I had items in them! I didn't lose the items they're still in the list but caused my threshold to be compromised.
I'm using SharePoint 2010 Foundation and it's very tedious to place the items back into the folders.
Has this happened to anyone?