Explorer Bug, Long Path, damaged directories
Long ago, I found something strange in Windows Explorer, which I wanted to retry on Vista today.
In Explorer, first create a very big directory tree, consisting out of small directory names. Now, from the bottom, rename these directories to about 100 characters.
When you reached the top, try browsing the tree, after some directories it won't allow you to open the directory anymore. You can't select it, it will jump back, you can't rename that one, you can't delete the entire tree at once.
Read more at http://blog.cumps.be/explorer-bug-long-path-damaged-directories/