I updated to the latest version a few months ago, so I dont think thats the problem. but, the brass sounds muted unless I make them legato with a slur and they sound normal. Bass guitar does an unattractive, distorted slur between each note.
In truth, I haven't used the template since I've had them. I suspect its an installation error.
I use an iMac OS X Lion 10.7.5 and I'm running Sibelius 7.1.3
Thanks