I don't mind at all
You were obviously relying on the analogue signals that are also sent down the cable. Older boxes have something called an analogue pass-thru that allows these through to the RF output (together with the decoded digital signal). Newer boxes do not have this pass-thru. I would suggest that you pester customer services for a thing called a bypass. This does the same job but lies outside the STB.
For more discussion about this try
this thread.