Update December 7 '07:  Article with Details of Several Incidents
The campus paper reports on sanctions for code of conduct violations.  The article describes various incidents involving the two fraternities:
http://www.dailyevergreen.com/story/24249
Among the incidents reported in more detail:
*  A  couple of fights at the WSU vs. San Diego State football game:   ".  .  . the board determined fraternity members, including minors, had been drinking. "
*  A  fight on September  28  at "an unregistered date dash"  party sponsored / hosted by the Alpha Gamma Delta sorority 
*  A fight outside a pizza place (this is the incident where a Theta Chi member's jaw was fractured)