dammn crazy i again received 0.00042 btcs from unexpected address... 
its crazy man..
its crazy man..
Check your address on blockscan.com. Any weirdo XCP assets in there?
What's XCP ??
Anyways I can't identified who sent that..there is no public note also...
I think they are scam sites payment..they are enticing me to invest..
XCP = Counterparty, which is an altcoin. Announcement thread can be found in https://bitcointalk.org/index.php?topic=395761.0.
Well it is still economical to spend the 0.00042 (unlike the 1-sat spam I received), so you should be happy about it.