Not sure what you mean. On this board there is this showing forums that have new messages and this showing what threads have new posts - clicking on either takes you to the new stuff.
Just fired up IE (usually FF) and it was showing 'missing' images icon for 'new' - so it looks like you may have them cached, but the originals aren't in the server where they should be.
Somehow your language was set to english_british-utf8 and the board's was set to english (ie US English). both are now corrected and hopefully you'll see the new image now.