Street sweeping reminders not being sent?

[keithn.livejournal.com]

Tomorrow is street sweeping on the odd side of the street in my neighborhood, but I didn't get the street sweeping reminder e-mail today from Somerville that I always get at 4pm on the day before.  I looked back and they didn't send one last week either, with the last e-mail from them being on December 2.  Does anyone know what's going on?