Wikipedia to color-code unreliable information
The main worry when someone talks about reliability, or Wikipedia in general, is a serious lack of objectivity. Some controversial pages become battlegrounds that are changed back and forth daily, and all of those changes are (rightly, I think) going to hurt the pages' perceived credibility under WikiTrust. New text will start out with a bright orange background that fades gradually to white if it survives without editing for a while.
The only place I can see the system failing is in cases of vandalism. When a prankster seeds a page with fake information, it'll be new and labeled untrustworthy. That's good. When the correction suffers the same fate? Well, that might be bad. The saving grace is that a reliable registered user's changes start out with a lighter shade of orange than an anonymous vandal's, so they're not actually treated the same way.