Hi there,
i've just run into a bug at base defense map. It seems that installations that are two tiles wide (dropship hangar, alien containment) get partially overwritten by the next installation. The first screenshot shows the dropship hangar, which is mixed up with a interceptor hangar, the second shows half of an alien containment.
Savegame attached will encounter a base attack after ~6h.
Happend with latest nightly from May 1st.
Regards
Tantalus