Map Compare is a lovely tool. However, when the cache density is especially high in an area there are a lot of caches included each time you bump the radius of the search up by 1 km.
If you enter a decimal number (by either using the dot ('.') or the comma (',') character, it will be rounded down to the nearest integer.
My request is to support the entering of decimal numbers into the radius field (and indeed other distance fields as well) instead of just integers. That, or permit us to enter radius in meters as an integer ;)