Thanks for all of the insight to the engine shutdowns for taxi on the CRJ.
I'm puzzled by the mention of a tire fire in the FAA incident report posted above. The wheels look fine in the photos I've seen. Also, the LiveATC.net feeds don't seem to have any mention of a tire on fire in the ATC or fire crew clips. The ATC feeds are scanning several channels and miss some transmissions but I would think that a tire fire would be a discussion item for the crash crew as they knocked down the engine fire and made sure no one was left onboard. The ARFF folks are recorded on a separate LiveATC.net feed at DEN.