I manage multiple SharePoint 2010 farms and Windows Explorer View works fine in all of them except one. In this one farm only (single server dev setup), regardless of web app or site collection, using the same IE client, I am unable to paste a file from my desktop into Windows Explorer View of any document library: I get "Can't read from the source file or disk". I am logged in as a farm admin, permissions is not an issue. I can open files fine from Windows Explorer View, I just can't save. As for deleting, if I try to delete a file, it appears to be deleted, no errors, but if I refresh, the file re-appears, i.e. it was never actually deleted.
Since the client works fine with other farms, I conclude this is not a client side issue, not a WebClient service issue, not long URL or special characters. From the (rather old) whitepaper here http://www.microsoft.com/downloads/details.aspx?FamilyID=c523ac7a-5724-48be-b973-641e805588f4&DisplayLang=en I don't see any server side config that applies. In the ULS log I see the PUT request but no errors.
Anything I can do to troubleshoot? Specifically I'm wondering what on the server side could be at issue here.
Thanks for any input.