inherent Conflict: Whenever a group of people is assembled to achieve a goal; at least some conflict is likely to occur. Contrasting personal styles can clash and some members may have difficulty accepting ideas that differ from their own. Peer pressure can also result in a team member going against her better judgment to escape the madness of other members or to facilitate the completion of a project.
Always remember the teams can be advantageous or disadvantageous to a company.
http://www.hf.faa.gov/webtraining/teamperform/Team008.htm