nanocore, ascherjim,

just to let you know that someone is reading this and trying to figure out what might be the cause. I myself use KAGU with a fully-packed 4GB SDHC card (external), and do not experience this (and I also listen to classical movements), although I do not use BT headphones (I am sure this creates another layer of complexity).
Not being one of the core programmers I am not much of a help here, but judging from my technical background this sounds some kind of BUFFER problem to me, some streaming issue between KAGU and the underlying player. Sorry again for so many words without a real help,
greetings, karl.