Some reported in this thread that the problem is fixed, but it isn't for me.
http://forums.rockbox.org/index.php?topic=2600.new

I tried CVS, as well as the 20060214 daily build, no change.

--
gl
----- Original Message ----- 
From: "gl" <gl@ntlworld.com>
To: "Rockbox development" <rockbox-dev@cool.haxx.se>
Sent: Tuesday, February 14, 2006 3:41 PM
Subject: iRiver H1x0 playback glitches.
>
> David Bryant and I are both seeing regular audio glitches during playback 
> in recent builds.  They're infrequent and seem to be related to CPU 
> boosting - watching the audio thread, the glitches happen when the CPU 
> freq changes (but not every time).
>
> I'm seeing it on both OGG and Wavpack files, not on MP3's yet, but I 
> suspect it's a global problem exascerbated by CPU usage.
>
> Can someone take a look?
> --
> gl