Hi Ionizer,
I am using a dcs900 which may be different enough to not be of any help to you. But I did have to setup the video size to match the phone (320x240 I think).
So basicaly, it seems that you cant have both a large image for a desktop and a small image...it's one or the other. Since I really only use the phone to monitor this camera, it hasnt been an issue.
The dcs5300 I have doesnt have this problem...the desktop page and the phone page can use different sizes.
Leslie