What's up with nzbs downloaded from nzbindex?

Every nzb i download from nzbindex cant be opened with nzb download checker. It says:

http://img257.imagevenue.com/loc154/th_204489350_Clipboard02_122_154lo.jpg

It has started happening not so long ago

NZBS downloaded from all other index sites work OK

I just checked a few of NZBIndex.com's NZBs with SuperNZB's checker and they were fine. If you give me a link to a specific NZB that causes the problem, I will take a look at it.

SuperNZB uses the Expat XML engine, so it is robust. Download it here:

http://www.techsono.com/supernzb/index.html

You don't need to register the program to use the NZB checker. Just load in your NZB file and click the "Check" button on the "Downloader" window.

Never heard of SuperNZB.. is this better than SABnbz?