While the callout is enlarged to 300 percent so that you can more easily see what I'm talking about, dark areas in high-ISO-sensitivity images, both raw and JPEG, are riddled with white spots. While these types of spots aren't unusual, they do tend to be larger and less frequent within an image. (I originally thought my monitor was very dusty and tried to wipe them off--that's what it looks like.) You can probably only see them at 50 percent zoom or higher, though, and if you apply a little luminance noise-reduction in the raw processing they disappear.
(1/100 sec, f2.8, ISO 800, AWB, spot metering, 60mm macro lens)