I'm sorry to inform that I can
confirm the following (as said by others):
Started up OpenXCom latest nightly with FMP 1.9.4.
Test One:Changed Small Rocket to damageType: 8
Test Two:Changed Alien Grenade to damageType: 8
In the Battle Simulator I went up against hybrids.
Small Rockets did kill them on direct hits. But no explosion outside of tile of impact was visible.
Alien Grenades didn't even scratch them. But I think I missed them by one/two tiles all the throws (rookie-stats, ugh). No direct hits.
I did land (with instant grenades on, so that every one should count) at least four grenades one or two tiles away from a Hybrid.
A 90 power strong explosion should've taken out such an enemy. The explosion graphics was there, but not the damage.
Oh, well. There goes my dream of Acid Grenades out the window. Hrmph!