Just installed Tiny Tiny RSS reader on my server. I added five Stack Overflow feeds to it.
The C# feed is not working, but the rest are. I can open the C# feed perfectly on my home computer using the exact same URL. However, when the server tries to fetch it (every 30 minutes), it comes back with a HTTP error 400. The other four Stack Overflow feeds work perfectly though.
So I'm wondering if the Stack Overflow RSS feeds have a limit on how many requests it will allow from a single IP?
The C# feed URL I am using is: https://stackoverflow.com/feeds/tag/c#