NES: 'A Nightmare on Elm Street NTSC' on PAL NES - glitchy graphics

[Shadow_Zero]

I just got a (NTSC) copy of A Nightmare on Elm Street for the NES, but it doesn't work properly on any of my PAL NES' (of which one is a French RGB model). The graphics of the intro screen are all blocks and playing the game results in a heavy flickering.
In the end I took out my good ol' Tristar for the SNES (haven't used it in ages!) and there the game works fine!
I've made a video of this: http://s1293.photobucket.com/user/Shadow_Zero80/library/NES%20mods/A%20Nightmare%20on%20Elm%20Street%20NTSC

I don't have many NTSC NES games, but I have a few others and I've never experienced this phenomena. Does anyone have an explanation for this? Can I get it to run properly on a PAL NES?

EDIT:
Got quite some info over at Assemblergames in the meantime: http://www.assemblergames.com/forums/showthread.php?51363-NES-A-Nightmare-on-Elm-Street-NTSC-on-PAL-NES-glitchy-graphics
Apparently there are quite some import games that just don't work properly on a NES. Too bad!