If double clicking on a folder on the right hand pane of explorer opens a new window all the time, here is the fix. I know this works for XP.
Open explorer
Go to Tools > Folder Options... > File Types (tab)
Select "File Folder" and click on "Advanced" button.
Add a new junk entry by clicking "New".
Enter values "To DOS" and "cmd.exe" in the two text boxes and press "OK".
Then select "To DOS" and click "Set Default" (This is very important)
Click "OK", "OK".
Close explorer.
Open regedit (Start > run > regedit > OK)
Search for "To DOS".
Delete this node from the "shell" folder (HKEY_CLASSES_ROOT\Folder\shell).
Close regedit and restart explorer and the problem should be fixed.

Weekend trip to Bheemeshwari.

Had a great weekend on the bank of the Kaveri at the Jungle Lodges and Resorts' log huts.
The tree nets, hammocks, sweltering heat, AC rooms, evening party, blackjack, pictionary, dumb charades, coracle ride, the skipped camp fire, the river side darkness and the (aargh) spots of flash lights, the singing, the morning trek, elephant rides, baby and horny elephants, river rafting, black jack in the jungle and beer in the car. A great weekend with fun people. Very happy :)

Snaps at http://www.flickr.com/photos/59787849@N00/