Actually "large percentage of the player base" may not be accurate.. however it is obviously effects more then a few.. I have not had one single memory leak since gold let alone 1.06.. I am running on windows xp 4 gigs ram (even though silly pc only uses 3.5ish), athalon 64 x2 6000+ cpu, mn2-e mb and geforce9800 gtx plus.. I do not really see any significant performance issues wtih tons of monsters/npc's on the map.. but again others are so I think have some very specific errors associated with some system configurations..
this has got to be driving the tech staff at stardock nutz trying to figure what is going on..I know I would be trying to trouble shoot it..
Perhaps you and I just have a different idea of what constitutes a large percentage. I would consider even 5% of people suffering from a bug that cripples performance (before the crash) and stops people from playing a game to it's finish (due to an unavoidable repeatable crash) to be large enough to constitute a significant portion of the player base.
I will admit that, from my perspective, things may be seem a bit skewed. I only have my own experience, and the numerous threads about subjects such as this to place my projection as a "large" percentage. I'm not trying to say that the vast majority of people have issues, I don't have any hard data that would make that statement anything more than hyperbole. Personally, I'd love to think that there were more people having fun with the game, than sitting and reading through the forums wishing they could enjoy the experience themselves.