This is still an issue after such a long time! Can only accept invites to local calendar and cut/paste to Google calendar will re-invite (aka spam!) all attendees. Thunderbird 17.0.6, Lightning 1.9.1, Provider for Google calendar 0.18, Ubuntu 13.04, 64 bits.
This is still an issue after such a long time! Can only accept invites to local calendar and cut/paste to Google calendar will re-invite (aka spam!) all attendees. Thunderbird 17.0.6, Lightning 1.9.1, Provider for Google calendar 0.18, Ubuntu 13.04, 64 bits.