Comcast continues to take a hard line in negotiations with regional sports networks. But this time, the telecom giant is even taking a hard line against…itself? That appears to be the case, at least.

Xfinity subscribers in the San Francisco Bay Area were given less than 24 hours' notice of a change to the channel that airs Warriors, Sharks and Giants games.

The rate increase will also affect fans of the Golden State Warriors, San Francisco Giants, San Jose Sharks and Athletics.

SAN FRANCISCO, CA (December 30, 2013) – Comcast SportsNet Bay Area (@CSNAuthentic), the home of “Authentic Bay Area Sports” and the official cable television home of the San Francisco 49ers, continues ...