Here's a challenge: It would be nice if Microsoft would fix the issues with IE11. Like all the sites that work with IE10, that don't work anymore with IE11. Their solution was to issue an IE11 upgrade blocker with a shitty manual install routine.
Internet Explorer has been and continues to be hostile to the web. It easily makes my job as a web developer at least 50% more difficult which translates into costing my employer more money. As far as I'm concerned, we as developers need to make a concerted effort to force Microsoft to either adopt WebKit or release a version of IE that is 100% standards compliant.
> has been and continues to be hostile to the web
I'm going to have to dispute "continues to be": http://caniuse.com/#compare=ie+11,firefox+25,chrome+31
You have to scroll down quite a ways before you find feature differences between the browsers, and it's not quite clear which (except maybe Chrome) is the best. If we remove feature drafts, it's a good deal closer.
Now, regarding has been: http://caniuse.com/#compare=ie+6,ie+7,ie+8,ie+11
Well, there's no contest there. IE8 being the last supported browser on XP is a harsh reality for web developers. :(