Size and position of Finder Window at reboot

I realize this issue has been covered, but I haven't been able to find and answer to my specific problem. Recently I have noticed that when I reboot my MacBook(10.6.8) the Finder Window opens in its default size and position. I set the size and position as required and it maintains that setting until I shut down. The next time I boot up the same thing happens, finder window is back to the default setting. All other settings(view etc) are OK, it's just the size/position that doesn't hold at shutdown. This is becoming a real nuisance and I would like to find a fix if possible. I have trashed the finder.plist and that doesn't work. Also tried some of the listed possible cures, to no avail. Does anyone have a fix for this problem?

Thanks in advance for any and all suggestions.