I just received a Juiced Systems USB 3.0/2.0 13 (4x3.0, 9x2.0)
Your guide says it can run 6, but that is total bs!
I can run 3 MAX on this thing before I start getting more hardware errors than accepts. As soon as I plug in a 4th I get nonstop errors. Here is a picture from when I woke up this morning. The BAJ is a BFL Jalapeno
http://img.photobucket.com/albums/v239/mikestrike/wat_zps9a9b5f86.pngI had 5 plugged in. After messing around for a while, I finally got it to stop showing USB AMUx READ BUFFERING XXX EXTRA BYTES and have all of them mining correctly with 1% or less error rate. I had to reduce the number connected through this hub to THREE before the errors went away!
maybe something with the 2.0/3.0 mix. which side were you using 2.0 or 3.0?