I received 2.1 last weekend and put my task killer right back on my desktop. I had been using is religiously for months. I would kill tasks several times a day because the phone seemed to get laggy so quickly. After reading some of the older articles on the subject I decided to uninstall it and give it a try. What I have found in the last two days is that my Eris has run flawlessly without the task killer. No lag that I can think of. Basically what it comes down too is it seems the phone doesn't know it is low on memory or that is should lag unless the task killer tells it that it is. I am going to keep the task killer off unless I run into any problems in the future.