Arkanoid US / World issue with update from MAME 120 to 121

[mrclean]

I thought I had a bad rom version in .120 because MAME was telling me when i loaded up the US version "one or more chd/rom are not correct.. etc" so i re-aquired them.. and installed a fresh version of MAME .121, Same msg i got.. but thats not even my biggest concern, within the Button Mapping when hitting, TAB i can't map one of my buttons to it anymore?! doesnt make any sense.. the button is working in a similar game .. "Gigas" how can I map that button? It's sooo bizzare... infact i had it working in 120 just before the .121 install I had P1 Button1 mapped to two different buttons on my panel.. now it won't even let me map the real one I want? Any body?

oh ya forgot to mention.. i did a "rebuild" to the rom set with clrmame latest version. I didn't drag n' drop

Now its letting me do it.. all i did was restart windows? anyways its working now weird none the less.. however i looked on maws and said this was altered in 115 is that why i'm getting that msg? I still shouldnt though??

on the US version"one or more roms/chds are incorrect and might effect game play etc..."

[u_rebelscum]

I thought I had a bad rom version in .120 because MAME was telling me when i loaded up the US version "one or more chd/rom are not correct.. etc" so i re-aquired them.. and installed a fresh version of MAME .121, Same msg i got....

.. however i looked on maws and said this was altered in 115 is that why i'm getting that msg? I still shouldnt though??

on the US version"one or more roms/chds are incorrect and might effect game play etc..."

No, it's a bad dump.  Clip from maws (just below what were looking at):
arknoidu.uc  2048  de518e47  arknoidu  bad dump  b8eddd1c566505fb69e3d1207c7a9720dfb9f503

This means the original ROM was not correctly copied (aka "dumped") in the first place, and noone at mamedev has access to a non-bad dump.  Someone with the original us version PCB needs to correctly redump the ROMs (and it needs to be verified).  Until then, mame is letting use the bad dump. 

Nothing else will fix the emulation, so mame gives that warning.