I have a few alias files that popped up after Firefox crashed while downloading. They can't be deleted, dragged, or even referenced in the terminal (I tried running ls -a, and they didn't appear in the listing). Permissions for these files is "unknown access". Here's oddest part: these aliases only show up in Smart Folders. In this case, they're aliases to video files that were downloading to my ~/Downloads folder, so if I set up a Smart Folder that limits itself to video files, the corrupted aliases appear. If I browse my ~/Downloads folder in Finder, they're nowhere to be found. Any advice?