Originally Posted by
Isonyx
Basically what Flareboy said.
The rumors you're probably hearing about pertain to Freedom Hosting servers which were reportedly compromised by someone.
It came right after the FBI arrested the owner of Freedom Hosting, indicating it was probably the FBI.
Whoever compromised the server set it up so that it injects a javascript exploit into versions of Firefox 17.
The exploit came with a malware payload, so that'd be something to watch out for if you've visited any of the sites.
As for the hidden servers on the Tor network, many of them have long been infiltrated in the sense that goods and services offered by anonymous users are unreliable.
Your QUERY issue however is probably something to do with your actual Tor configuration or the site you're trying to access.
If you posted the exact error here we'd be happy to assist in determining the origin.