OMG!  B & 0, please!  Spotify requires master mode on the Beosound 5.  I have suffered through the inconvenience and expense of multiple service calls related to lockups in my integrated system of B & O products at a vacation property (Miami Beach) I own that is remote from where I spend most of my time.  In brief,  4 rooms, each with a Beovision 10 and some combination of B & O speakers. Its all integrated through a rack closet containing all the wizardry required to support such a system including an Atlona 8x8 matrix HDMI switcher routing signals over Cat 7.  If the local showroom gets wiped out by the next hurricane,  they could probably operate out of my property....if it was only reliable!  I'll try to be as succinct as possible.  The main living area has both a Beosound 5 and Beosound 9000 as well as a Beovision 10 with front and rear Beolabs.  Periodically the sytem will lock up and the Beosound 5 will always have switched to Master mode....and as I've learned the Beosound 9000 does not like that at all.  After many visits and consultations with corporate B & O, my installation team and my dealer, I am told B & O headquarters said the problem was with the Beovision 10 and replaced a "board" after some delay in getting it. Other attempts to "fix" the problem have included replacing a motherboard in the beosound 5,  sending my Beosound 9000 off to have it updated, etc etc,  The system seemed to remain stable for some 5 weeks as it was fully operational when I last visited. I had inquired how to bring Spotify on board and was told it would be present and operational when I arrived at my next visit as the firmware update  would be pushed automatically to my  Beosound 5.   I met onsite with my dealer at my last visit and then discoverd they had also turned the automatic updartes off as they were still hypothesis testing how my system was spontaneously switching the BS5 from slave to Master mode and thought that perhaps this was occuring with firmware updates..so no Spotify...my dealer then was to check if Spotify would create any problems and gave me green lights to update the firmware.  I read that Spotify required Mastermode and thought to myself, hmmm...that sounds like trouble all over again,   I then queried my installer who eventually understood my concern and now I'm stuck with no apparent solution and the knuckle brain and short sighted integration of Spotify requiring master mode on the BS5 which will royaly screw every owner with legacy products like the BS9000 in their system.  I suggested to my installer he go ahead and update the BS5 and I'd unplug the BS9000 until B & O gets its act  together, but then he states the new firmware update will lock the BS5 in Mastermode and I would not be able to get it back to Slave status.  Unbelievable!  I wanted to rip every B & O component out of my property and pile it at the dealers doorstep.  In my line of work this would be considered malpractice.  I have a hard time understanding/believing this as it  risks screwing up a lot of systems with legacy products...the loyalist customer base you would least want to alienate.  When I pushed for clarification from my installer he stands by his position.  Who is on 1st at B & O?  Unfortunately,  I still don't know wheter my 1st problem has been fixed by the Beovision 10 board replacement or by the turning off automatic updates and for now I can not risk an update to the firmware that would force an irreversible Mastermode status onto the BS5.  I would love input from Peter, Stefan, Razlaw, Elephant and other luminaries that frequent the forum and know much more than I will ever know.    Thank you in advance.  Ron