ok so i replaced my master cylinder in the summer..... and iver noticed that even the new one leaks fluid...heres a pic any suggs..
http://xpupload.hpphoto.com/servlet/...6d5745b8&size=

 

Take it back too where you bought it and get a new one

 

Looks like it's leaking onto the booster = rear seal but can't tell because pic too blurry - you were too close when you hit the button. Take it back to shop you bought it from as should be under warrantee. I remember all the problems you had trying to fix the brakes the first time... Hope you get it replaced okay.