+++ This bug was initially created as a clone of Bug #2759 +++

This is a bit hard to set up, but once set up, is entirely reproduceable.

I have 2 SBs. I've called them SB1 and SB3 (I named them at the web interface). 

If you go to the home page on the left panel of the UI and hover over, say, Browse Albums, in the message bar at the bottom of the IE window you can see the command that would be generated if the link was clicked. It is http://localhost:9000/browsedb.html?hierarchy=whatever&player=MAC ADDRESS
If you, on the right pane, switch to the other SB, the page refreshes and now if you hover over the link it will say yada,yada,yada&player=the other mac address.

Now start winamp on the same computer, dial in http://localhost:9000/stream.mp3 and a new player shows up in the right hand pane, allowing you to select that player. Once you select that player, the left hand pane URLs change so that they say player=127.0.0.1 (in my case - that's localhost in IP). 

Now change the right hand pane back to one of the hardware SBs. The URLs on the left don't update. Now you can no longer queue files to any device except the software one. No matter what you do with the right hand pane, the left hand panes continue to contain player=the software one, and that's the only place you can queue music.

You can hit refresh on the browser. 

For me, this works because refresh always causes the right hand pane to go to SB3 (I don't know why this is - it forgets whatever it was and goes to SB3). 

For one of the people on the thread that started this bug, it always goes back to the software one. And so he's now stuck only able to queue music to the software player.

This last bit sounds like it may need to be broken out as a separate bug. Or it may have been reported already. I haven't checked yet.

In any case, Refresh is an undesireable workaround, because you lose your place in the browse hierarchy on the left pane. If you had drilled down to Various Artists/Album/Title, you now have to re-drill to get there again.