I'm using an old version of mahout (before the big branch of mahout-150) and the evaluation of my item based recommender done with GenericRecommenderIRStatsEvaluator doesn't work very well: it always returns precision 0 and recall 0. I'm using a port of mahout in C# so I can't debug it properly, but I've seen that the program seems to recommend almost the same items to everyone and in numerical order (es. 612,613,614.).
What do you think could be the problem? (anyway, how much do you think it would take to adjust a program to pass from the old version of mahout to the new one? Is there going to be a stable new release in the near future?)
