After upgrading to FogBugz 8 first edit of any existing document produces a huge diff e.g.

As a result it's totally impossible to understand what the user actually edited!
I would propose several solutions to this problem: 1. Automatically create "Style modification" revision to any wiki document during the upgrade. 2. Automatically create additional "Style modification" revision the moment someone edits old document (so 1st edit produces two revisions). 3. Change the diff viewer to suppress style changes in such cases.
But now, we already got lots of documents with diffs that mix style changes and actual user changes. I think the right solution will be some kind of "fix" script that goes over the DB and splits the already existing revisions.