If your orkut account is hacked then only you are responsible for this , Orkut always recommend users to surf safe while accesing orkut but instead of this many users account is hacked .

Now you can also add Images in your new orkut background ,all you need is to create that theme use simple process but make sure you can view that theme only in firefox or in other words you can put images in your new Orkut background only in firefox .

Finally orkut have announce the launch of a brand spanking new version of orkut but they are granting access to it via invitations. So if you are interested to get invitations for the new Orkut design

If you are using New Orkut then you may face many problem , new orkut layout is not so much friendly for everyone and in that case you can easily switch to older version .