The first time i suspected of the problem i think was when using forums like this one, because i was missing some copy + paste operations. Actually, i was about to send in the post a printscreen on how my pointer was like in a second line, but when i clicked the selection of text was beeing done in the line above, but funny thing: in the print screen image the pointer was a little bit above. Funny thing as well: right now the pointer seems to be ok.
The first time i realized i was having this problem was when playing Dota 2 playing with the hero Techies. With Techies i plant bombs in the ground, but i could realize the bomb was not beeing planted exactly where i was clicking.