Darwin has an awesome article by David B. Waters on getting your mis-aligned team to work together again. Lots of great learnings here.

Teams Gone Bad
The symptoms are easy to detect. Here is a list of a few causes and associated symptoms common among troubled "teams":

• There is no clear direction, usually due to a gap in or poor leadership. However, perhaps the team leader is not receiving clear direction. Lack of clear direction manifests itself in missed deadlines, fragmented or disjointed results, and in a lack of team commitment.
  
• There is no clear leader, either by lack of appointment or by lack of acceptance. Absent leadership results in wasted time, inefficiencies, poor results, incorrect results, no results and poor team-member morale.
  
• There seems to be no connection to the business because the business objectives have not been tied to the project/individual tasks, or the project simply does not connect to business objectives (proper justification was never required). Team members become disenchanted with the leaders/company, feel isolated and not part of the "real" business team, and tend to lose sight of the business purpose.
  
• People work in silos to protect their own interests, to control specific outcomes, to ensure "something" gets done, or to mimic the operating style of the overall corporation (silos may be prevalent). Common symptoms of "silo dwelling" include poor meeting attendance, inadequate communication, limited brainstorming and scarce cross-functional problem-solving.
  
• It is hard to retain or attract team-members. Or it becomes impossible. Obvious symptoms include requests for transfers, members leaving the company and no requests to join the "team." Over several months and years, a team's composition would gravitate toward average or poor performers.
  
• Members bicker and argue more than they laugh and problem-solve. A few symptoms include an absence of communication, accusatory communication and common phrases such as: he said, she did, they didn't, etc. These demonstrated behaviors replace healthy team behaviors (discussed in the following section).

[via inluminent]