maybe some privacy setting- hiding pic and name. Go and change your settings and check with others. I have seen this before on other social networking website Orkut and it was the privacy settings.
It should be set your account settings, Go to the account settings then click edit name and change your username...it's very simple.
If it is so simple, try and show us the results Facebook does not give permission to leave empty the name area
It's in the privacy settings, make your account not visible to others except your friends or just yourself and selected people. Usually a "Facebook User" phrase will replace the name but if it's really blank as what you have posted, could be a bug or something new in facebook. I'll check it out further.
I have checked his profile.. really a strange... I don't know how he/she did it.. but I want to learn.
normal account : https://graph.facebook.com/sefakavil this account : https://graph.facebook.com/xanbango (is not seen also here)
This is the first time I've seen such Facebook profile that has no name. I wonder how it really made.
That's strange, i don't know how he did. It seems as if he did some coding and all to have no name mentioned on it. I even tried spacing and that too didn't work.