I IM some people on yahoo and get no reply, that's OK, but sometimes I might IM someone 50 times on 50 differnent days and on the 51st time we chat like we are long lost friends and then it is back to no reply for a few months and then long lost friends again. This makes me think that rather than me being intermittently hated, there is, as someone has suggested, a communication problem on yahoo where you can IM someone who is on line and they do not see it or you do not see their reply.