Unable to stream 192kHz on DSM 5

[Sorren]

I have been using Minimserver (and Minimstreamer) for a few months now on my Synology DS212j and haven't had any problems. Since updating to version 5 of DSM last night I can no longer stream 24/192 music as there are frequent pauses/drop outs. 24/96 music streams fine and the built in server on the Synology is also unable to stream 24/192 files. I also know it's not the network as firstly it worked OK before the update and secondly the player (Naim Unitiqute 2) and NAS are connected using CAT7 cable through a gigabit switch.

Does anyone have any idea why this should be and maybe a work around? Minim was also updated last night but as Synology's server also displays this problem I don't think it's a fault with Minim. Nothing in the logs jumps out at me so ...

Any help would be greatly appreciated.