Maybe he found the solution using outdated Newtonian methods or something but generally the problem described is an old one which has been solved and is a standard problem in particle dynamics. Again, maybe he solved it using certain methods but the problem itself has already been solved in many ways.
Newton posed the problem, relating to the movement of projectiles through the air, in the 17th century. Mathematicians had only been able to offer partial solutions until now.
According to the article, mathematicians had only partially solved the problem. Plus, if it has already been solved and it's a standard problem I don't think experts in that specific field wouldn't let it just slide like that, innit?
Alpha, that is not good in what way?
