What is the reason for so many problems from 2.5 and on?.

Seriously I do not recall the previous version having as many problems and apparent bugs specially freezing if you sneeze at them problems that plague the current versions. So what changed so drastically from 2.4 to 2.5 and onwards? Is it that the 64k builds are more problematic than they were expected to be? On that note have developers being able to recreate the freezing problems that just about all users are now experiencing but cannot be reported as errors precisely because the application just freezes and has to be terminated through the task manager? If not they might have to do just that, randomly click on files or tabs especially in the uploads/dowloads tab/window they should try clicking on the Start option as frequently as possible because we now know I'm not the only one by any stretch of the imagination that has this problem. Is just a suggestion on how to approach this problem since no error ends up reported so the normal method of bug reporting does not work.