Always show folder list pane in windows explorer

There are many ways to go to windows explorer. you can press windows key+e, you can open My Computer,you can open my documents. In some of the cases folders list pane does not always show up. to do this follow the below steps:
1. Open a Explorer window.
2. Select Tools -> Folder Options -> File Types Tab
3. Scroll down to the Folder file type. It should be one of the top 10 entries with the extension (NONE).
4. Select the Folder item and click Advanced.
5. Select the explore option and click the Set Default button.
6. Click OK and you are done.

Bug in Vista explorer

Recently while working on my vista pc, i found an interesting bug. We can rename a file to have special character like #. What I was doing to rename a chm file and I put # in the file name. Windows did not give any error. But when I tried to open the file It was not displaying any content.
I wonder how I can submit this bug to microsoft?