There is small, but annoying, bug in Challenge Checkers map. If you create a map with challenges and select one of results, there is tooltip opened with the cache details (name, coords, checkers, ...).
All the links in the tooltip have target="_blank" attribute besides "Checkers: XXX" link. So everytime you want to see the checker and keep your map open, you need to left-click it and select new window.
<a target="_blank" href="/Challenges/GC57VMQ/470">470</a> is a solution that keeps window behaviour consistent.