kill one and boom no matter where you are in the room you get hit? has to be a bug!

They just have really wide blast radius, you have to be about screen away to avoid damage. Pretty annoying, I ended up just evading them - not worth the effort and they are in only few rooms.

This is definitely NOT what's supposed to happen.

I can vouch for this, since I've also got the Japanese retail CD-ROM boxed release. The proper behavior is for a red slime's explosion to have a limited AOE. When the player character and other enemies are outside the AOE they shouldn't take damage.

Unfortunately in the XSEED version, a dying red slime nukes the entire room. Pretty much all destructible objects in the room are trashed instantly, you cannot avoid damage, and all enemies in the whole room take a guaranteed hit as well even if they're not near the killed slime.

This is indeed a bug. :( I'm hoping it gets fixed.

Ah I see so it's not just me. I wonder if this was caused by any modern OS/architecture.