Hacking Problem in GRID with M3 DS Real

[gurtifus]

Hello,

I have some graphic problems in GRID running on a M3 DS real. In some drift contests in Japan, some garbled graphics appears in the underground parkings (it happens only in underground parkings).
Maybe it's a known problem.
So is there anybody who have the same problem ?
Could I fix it easily ?

Thanks for your help

gurtifus