Check the image - you can see slug detected enemy boarder outside the ship. Initially 2 boarders teleported in engine room but then one of them went outside through north door and immediately moved left through hull and up north to enter shield room from outside door i suppose
[img=http://s16.postimage.org/51nm09ub5/2012_09_18_00001.jpg]Seconds later again it goes outside through shield room left side below door.
[img=http://s13.postimage.org/kqey7vlqr/2012_09_18_00002.jpg]Finally boarder returns to engine room through north hull part ...
