I was confuse when trying to upload an image to Google Docs. They were converted to Google Docs file, and it makes maximum upload file size is 500KB only.

I found that other GMail account has ‘check box’ which allow us to choose not to convert the document. I believe some of your email don’t have this menu below :

I solved the problem by asking my friends who has GMail with that menu to invite me, re-create Google Account. And it works!

I hope Google Team can explain this. :)