Been having an odd problem since I got my Droid. A lot of the times when I try to access the Marketplace and I am connected to my home's WiFi, I get errors about it not being able to access the site. If I load up a web browser, I am able to get pages no problem. Sometimes the Marketplace comes up fine, although most of the time it doesn't with WiFi on. I also had this happen inside of the Android Wallpaper application, as well as the Mediafly Podcast downloader application. If I turn WiFi off, everything is fine over 3g. Anyone else having an issue like this? Like I said, if I open a browser, everything is fine, so I know the phone and my router are connected and talking.
Yep, I've seen this as well - Marketplace often doesn't work on WiFi but does as soon as I turn it off and switch to 3G. I've had trouble with it not downloading updates for apps on both connection types too.
