If you’re subscribing to a Conde Nast magazine and are downloading copies to your iPad, there’s a small bug to watch out for.
After consecutively downloading 6 issues in any Conde Nast magazine app (New Yorker, Wired, etc), you will get a “ERROR DURING DOWNLOAD : Cannot start the download because the file is missing or invalid.”
Restart the iPad and you can download more issues. (Closing and re-opening the app doesn’t fix it.)
Hopefully the next Conde Nast magazine app release will fix this (or increase the cache/timeout).