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 don't understand all that I know"
"I never said half the crap that people on the internet claim I said" - Abraham Lincoln