tahoe cp flattens directories

[zooko]

I had two entries in my local filesystem, a file named "22brain.html" and a directory named "22brain_files", which was full of other files and subdirectories. I ran {{tahoe cp 22brain* tahoe:22brain/}}}. Afterward I expected to find tahoe:22brain/22brain.html and tahoe:22brain/22brain_files/, but instead I found the contents of the local "22brain_files" directory copied directly into the tahoe:22brain directory. This breaks all the links in the "22brain.html" file and means I need to delete this directory and try again.