As GM-Auron said our svn is based on Iro and ragnawiki is the best source to check the skill changes... so it?s possible a bug.
Acid bomb according to ragnawiki is supposed to deal the dmg with the same property as ur weapon is(like fire property dmg for bazerald), but I checked and its still only neutral. http://www.ragnainfo.net/wiki/index.php/Acid_Bomb
(take look on the dmg formula)