When you extract something to a folder, and the folder name has spaces, if you put "extract" again, it will change your folder name adding "\"before each space, and it will create a new folder. and extract there.

Screenshots illustrates it easily
http://img393.imageshack.us/my.php?image=snapshot20fv7.png
http://img162.imageshack.us/my.php?image=snapshot21cm3.png
http://img162.imageshack.us/my.php?image=snapshot22hp9.png
http://img239.imageshack.us/my.php?image=snapshot23oi8.png
http://img393.imageshack.us/my.php?image=snapshot18vq4.png

Reproducibility: Happens every time

Steps to Reproduce :
1.Open a rar or zip file
2.Click on extract
3.Chose to extract it to a folder that it's name has spaces
4.After extract it, click on extract, and a the same windows appears, but with "\" char before " "

Actual Results : Creates a new folder

Expected Results: Do not change the name (Do not add the \)