I am using squeezecenter 7.5.1 with a SB3 and softsqueeze.
About every 30 minutes or so the player will hang up. 
Does'nt matter which player or if I'm listening to internet radio or music from my harddrive....
I just hit play and it goes again...
Are there some settings that can be addressed or is thes prone to the version of squeezecenter??
I have had the exact same problem lately. I cant remember when this issues started. I think I have the latest version of the SC. I am running a SB3/a duet and a Boom. Have experienced this issue with all three.
Al three are wirelessly connected. Never had a problem like this for the last 3 years since getting my first SB.
I was beggining to think that maybe my router was getting congested with all the data that its handling between audio/network HDD and different computers. Guess I need to fugure this out too.