Running Thunderbird 31.1.0 with Lightning 1.0 and Google provider add-on. I maintain four different calendars through google account (work, home, other, conf room). When I woke up today all my calendars worked. They were configured in Lightning as network google calendars, which pointed to their respective XML links. Suddenly this afternoon, without me monkeying with any of the GCal or Lightning settings, the calendars in lightning's sidebar stopped talking with google calendar platform. All events still appear in google calendar fine, and still sync up to my mobile device fine. The problem is: the calendars are just sitting , and showing the 'unsynced' light color. When I right click one and attempt to manually turn it on in Lightning, there appears a google password account prompt. After entering my google login , the prompt window returns: "Oops! Your browser seems to have cookies disabled. Make sure cookies are enabled or try opening a new browser window. " I can assure you that cookies have been enabled in my Chrome browser settings. Even double checked in Firefox, though its not my default browser, they're enabled there too. This failed to change the 'cookies disabled' message. I went as far as to clear all data from chrome, per googles' suggestion, and no dice. Even uninstalled Chrome, and re-installed, and no luck. I must be missing something. It shouldn't be so hard to flip the cookies switch and get these programs talking again... Will