I got an upgrade for FBReader less than 24 hours ago, so wherever it came from must not be down.

As a test, I did the following.

I went to www.gronmayer.com/it

I searched there for FBReader (for OS2008) and found the repository it was in.

I noted that it says that the repository is online, which I take to mean "up".

I found a web address for FBReader provided there, and I went to that address.

At that address, I found a one-click link for downloading FBReader. It worked.

You might try such tests when you think a repository might be down.