i have unkowen problem i search everywhere but i can get help

here what i mean
http://www3.0zz0.com/2012/04/01/13/196535986.jpg

http://www11.0zz0.com/2012/04/01/13/976658880.jpg

i block this char and its work fine ..

but no idea why that was happend ...

please i really mean it please help :(