Smoker - you are one helpful dude!
Armed with your yum commands, it occurred to me that I would not be hurt by working on the assumption that a full update would fix the problem (if it didnt then I would remove it)
so I typed
yum install nautilus
and it replaced the defective with a brand new perfectly functioning copy!
Love may be too strong a word - but I sure appreciate your help
I dont know why but it usually replaces my attempt to sign my name