What I'm seeing is that tracks in the (current) playlist don't progress, that is, if I have a list of Napster tracks, it will only play one and then stop or repeat that song perpetually. I can manually skip to the next one but it doesn't happen automatically. 

This happens only on MySB, not if I use my own (7.6) server. Also I am seeing some reports that this only happens if you use Squeezeplay or iPeng, not the Web Remote.

The same every few tracks when I use Pandora, even though there isn't really a playlist in Pandora.

Rhapsody seems to work fine.

I'm seeing a lot of reports by other people having similar issues.
This essentially renders Napster useless through MySB and I'm already seeing a lot of bad mood towards the Squeezeboxes in the market due to this. It works towards a general perception that the Squeezeboxes are a bad design due to their dependency to an unreliable MySB service. I believe these issues are somewhat critical due to this.

I see reports both from Europe and from the US.