I came across this post http://www.codinghorror.com/blog/archives/001072.html regarding a malicious intent behind the creator of g-archiver, a gmail backup program. Apart from doing what it claimed to do, the author John Terry stored and sent a copy of gmail username and password of every user who has ever used this software to his own email account. What a cheat!
Hence spread the word do not use G-Archiver!!