My DNN sites had been working fine when the server company hosting my database had a server crash. They restored from a recent back-up. The problem is that where the sites appear fine from the outside, I now get error messages when uploading, either as Admin or as Host. It's just files -- the blog module makes new posts fine. All other attempts to upload files give that "An error has occured, please contact your server about security settings" message.
The crazy thing is that, once you check File Manager again, you see that (a) the uploads that threw the error did upload successfully, and (b) they all have upload dates of 12/31/1600.
Restarting the database (which you can't do from within DNN, because of the error) has no effect, and there does not seem to have been any change in the config files. But something is affecting permissions. Particularly it is making some permission-sensitive modules like SeamlessAlbum useless.
I have the server company taking another look at my settings to see if it's something on their end, but does anyone have an idea of what went wrong? I need to avoid any solution that involves a new install, if at all possible. Thanks!