I just got screwed out of 0.03 BTC because of a malware that changes any address you copy into the malware owner's address. It even used a vanity gen to make the two first characters of the address the same (I was sending to 1Gm..., so the malware created a 1Gm address).
1. Before sending, always check the first two and last two letters to make sure it is the same address you are copying!
2. If possible, check a random string in the middle and compare it! Even better.
Be vigilant, y'all!
It could be a lesson for us to be careful enough and check the address many many times before we send coins. It sad to hear that there is a lot of people trying to stole their fellow. Always check every addresses we use to transfer fund,make it sure to be secure.