Kind of a longshot question, but I was wondering if there's an addon for IE10 that allows users to set their own compatibility settings for certain sites and make them persistent without having to hit F12 and changing it each time I visit the site. Official position from MS would be to contact the webmasters and get them to fix their sites, but not all webmasters are that responsive or bothered to cater to a browser with a fairly tiny marketshare at the moment (ironic for IE).
Only site that I would like to use this on is the Canadian Metro news
site. Took them months to make the site work properly in IE after I emailed them in early October. Before it was stuck in IE7 standards which completely broke the site. Now it's in IE8 standards, which is okay but font rendering isn't as great as in IE9/10 standards mode.
I also know of that XML file you can edit for compatibility settings, but that file gets overwritten each time MS issues an update.