Just received my 300 2.8VR from BH on Friday. Took it out today to play with it and found out I can't get it to focus correctly at times. I'm using it on a D70. Its set to M/A, FULL, Normal VR, AF-ON. The D70 has a full battery. When I focus on something close and then try to focus on something at a distance its just a big blur. Samething, when I first focus on something at a distance, then trying to focus on something close results in a blur. This applys to both hand held and on a tripod. I am pushing the shutter release button half way down and if it won't focus I quit pushing and then try again. Blur! BTW, this doesn't happen all the time. There are times that the focus between two points is very quick. I also have the 70-200VR and haven't had this problem with it. Please, someone tell me what I am doing wrong! Any ideas?