Never had a problem til today everytime I had checked.  I actually have an install scheduled this Saturday for a slimline.  I'm worried that my multiswitch is going or broke.  I hope the installer will bring a new one with.  
 
I changed from the old external powered one where everything was working great to the non powered one, that I got from the last installer, to open an outlet in the basement.  I know for sure one of the "outs" doesn't work because I checked my receiver and received no signal on one of the tuners, so I simply didn't use it.