iTunes causes modem to log errors

I noticed something really weird. Every once in awhile, my modem (Motoroala SB5120) would log something like this:

2007-02-24 10:19:09 7-Information DS multicast is not mapped to SAID

2007-02-24 10:19:09 7-Information B605.10 Map Reject - Downstream Traffic Flow Not Mapped to BPI+ SAID

2007-02-24 10:19:09 7-Information B601.0 SA Map State Machine Started

After puzzling over it, I figured out it occurs every time I start iTunes 7.02!

Any ideas on what the errors are about, and just how iTunes is causing it? They are only 'Information', so it's not a big deal, but it seems odd. A Google search turned up nothing.

This is on Win2K SP4, NIS2003 (only the firewall part is used anymore), and a Linksys BEFSX41 router, Comcast cable.