The rifle in that link article is an 1894. Is that problem specific to 1894's or all Marlins? I have a 336 that has seen three generations of use and I've NEVER had a jam with mine.
I have a friend that owns two 1894's and I guess he just hasn't put enough rounds through them for this problem to show up.
I have a very strict gun control policy: if there's a gun around, I want to be in control of it. - Clint Eastwood