TranceFixxed on "$dtdjr Error String on all Posts / Pages"

Hi all

Within the last 24 hours or so, all of the pages and posts on my website have the strange text:

#74ed9f# if(empty($dtdjr)) { $dtdjr = " "; echo $dtdjr; } #/74ed9f#

I'm not sure if this is a Wordpress issue of Webhost issue, so I thought I'd ask my ISP and you guys.

I have disabled all plugins and reinstalled Wordpress without it making any differences. I have also searched all the Wordpress PHP files for sections of the above string without finding anything. I don't even know what $dtdjr means!

Anyone else seen this issue (and know what it means / how to resolve it)?

Thanks in advance