This may or may not be the case, but according to a recent post on the Civil Wars Facebook page, the duo appear to be heading for a breakup:
We sincerely apologize for the canceling of all of our tour dates. It is something we deeply regret. However, due to internal discord and irreconcilable differences of ambition we are unable to continue as a touring entity at this time. We thank each and every one of you for your amazing love & support. Our sincere hope is to have new music for you in 2013.
- Joy Williams & John Paul White.
PS - We understand that there are many of you stuck with service charges and travel reservations due to our abrupt cancelations. Please email us at firstname.lastname@example.org if there are costs incurred that you would like to be reimbursed for, include a scan or attachment to your receipt(s) of the costs, and we will do our best to reimburse you for non-refundable charges.
Let's hope they can figure this out and put their differences behind them!