Oh Bliss, Oh Joy!
Understanding and Troubleshooting the SharePoint Explorer View:http://www.microsoft.com/downloads/details.aspx?familyid=c523ac7a-5724-48be-b973-641e805588f4&displaylang=en
I have been waiting and waiting and waiting for just this document. Why? Because I have been onsite many times to try and work through the issues now beautifully described in this document. Reading through it caused epiphany after epiphany: "ahhhh...so THAT is what is going on".
The explorer view feature is one that is VERY popular with end users AND it provides perhaps this simplest way to "Bulk Load" content into SharePoint, when it works, it works really well, however when it doesn't, getting to the bottom of why can be a real pain. It usually involves various combinations of NetMon, Filemon, Regmon and even sometimes an industrial strength medical stethoscope.
A really big thanks to all those involved.
Written by Steve SheppardAdditional contributions by Dustin Friesenhahn, Dan Szepesi, Dan Winter, Jon Waite, Tony McIntyre, Alonzo Millow, Scott Jiles and Drew Leaumont.
P.S. Personal thanks to Dan Szepesi who assisted me on a number of occasions while I was onsite!