Andrei,

I saw there was a new version today, which I upgraded to: 6.5.5.20914
Released: May 14, 2015

However I still have the same issue searching on freedb, I can reproduce it this way:

1) Add from FreeDB icon
2) pick "for Album Title" and enter "jazzberry pie"
3) 1 result returns (showing it is as FreeDB and theoretically retrievable)
4) either double-click on it, or click the "Preview and Add..." button
5) Error on Retrieving entry "bad HTTP status code"

Session Log:

Connecting to freedb.mygenres.com
>| GET /freedb/jazz/9a0b560b HTTP/1.1
>| User-Agent: OrangeCD 6.5
>| Host: freedb.mygenres.com
>| Connection: Keep-Alive
>|
<| HTTP/1.1 404 Not Found
<| Date: Thu, 14 May 2015 23:13:31 GMT
<| Server: Apache/2.2.3 (CentOS)
<| Content-Length: 302
<| Connection: close
<| Content-Type: text/html; charset=iso-8859-1
<|
<| <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<| <html><head>
<| <title>404 Not Found</title>
<| </head><body>
<| <h1>Not Found</h1>
<| <p>The requested URL /freedb/jazz/9a0b560b was not found on this server.</p>
<| <hr>
<| <address>Apache/2.2.3 (CentOS) Server at freedb.mygenres.com Port 80</address>
<| </body></html>