Sinan,
Ok, i did manual edits to my theme(im using SullenMadness theme)
Nothing appears to be broken and all new buttons seem to work, but on the front page (portal page) only the blocks on the left appear. Many are missing including the random image block even when activated.
In the middle of the page i have this under BOARD NEWS:
You cannot specify a board that doesn't allow guests. Please check the board ID before trying again.
Any ideas? I can PM you login account so you can see if you like.