Haven't gotten anywhere near that area myself but I would say don't re burn just yet. Wait to see if someone else has the same issue.

 

If it's a disc read error I'm leaning on the lens being the issue. You'd think if this was a problem it'd be reported more often here seeing as that's really early in the game.

 

You are preaching to the choir man. Between my DS PSP PC and Wii I think ive probably got 5000 games to play. More than I could finish in this lifetime

 

I just tried that level on my NTSC 1:1 version of mario galaxy on the gamma loader and it worked fine, probably your disc.

 

Mario Galaxy is a very picky game. I had to burn it 3 times before it worked.
The first disc allways froze at the intro and the second allways at the surfing game. So yeah it's probably the disc. Just burn it again.

 

No idea what country they're from, I just buy the individual discs from my college xD

Anyway reburning it worked when I picked up another Verbatim, I went through 3 Imation discs and none of them would work. Booting straight from the backup launcher would give me a black screen with lots of code and trying the disc channel (rebooting with hooks) would show a ? and blank out the start button.