CMS Text string inserted above body in CMS
 

I've come across a weird situation on my most recent site.. the only one I have upgraded to 4.0.3 because it's totally unused at the moment - www.nzfishtalk.com

There's text above the header. Above the attribute in IE even.

It's apparently fairly random, is not Template generated (as it appears on a totally stock style), and is not resolved by disabling all non-CMS-related plugins.

It almost appears to be an id of some kind - ccda/cba9/d800/ccb4, but doesn't appear to be the same on the same page. It's ... weird. Other sites that I have vB4Supercharged installed on exhibited similar behaviour, but not the same, and it's not installed here.

NZFishtalk isn't even running any form of datastore caching.

Uploading a fresh download of 4.0.3PL1 didn't fix it either.. I could probably nuke the db, but am wondering if anyone else has experienced it, or has an idea.