I just noticed that it seems to be impossible to hit UFOs with Stingray or Avalanche missiles unless you use aggressive attack mode.
Cautious and standard attack have no effect, 100% miss rate.
However, Plasma Beams seem to hit normally in all modes.
Can anyone reproduce this?
Build used:
openxcom_git_master_2014_01_20_1603.zip - built 2014-01-20 15:06