I installed Backgrounder soley for the use of Cydia. I wish there was a way to only have it enabled for Cydia and have everything else act as if I didn't have Backgrounder installed, but it doesn't seem to work that way.
One issue is with iFile. Background audio and fast app switching work without Backgrounder installed. But when I install Backgrounder and set iFile to use Native backgrounding, the app totally closes when closed. The only way to get it to keep playing audio is to force it to use the full Backgrounder option
I don't understand why this happens if iFile supports native backgrounding.