SMB share can't rename files/folders
This is something we had issues with today at work.

It goes like this:

Have a folder (Folder 1) and create another folder in this folder (Folder 2). Copy a file (such as an image) into Folder 2. Now you won't be able to rename Folder 1 without Finder asking for admin password, and entering that gives the same dialog as the second posted above by Ash. Moving (or deleting) the file that was added to Folder 2 out  from that folder makes it possible to rename Folder 1 again. Seems like a bug to me. It has been reported to Apple.