I just got bit by this. The AirPort Extreme base station I set on my desk (temporarily) was causing the MX Revolution to flash a red battery light while sitting in the charging cradle; and it would not charge.

Unplugging the Airport base station (and, I assume, moving it) allows the mouse to charge just fine. Hopefully this will help future Googlers on this topic.

UPDATE: I think I spoke too soon. I’m still getting the red flashing battery, but it appears to be charging – at least somewhat. I’ve ordered a new mouse .

UPDATE #2: It appears “the mouse is defective”, however they won’t replace it since I bought it on eBay.