Have never seen anything like it!
For some reason beyond me, the front brake caliper mount has bent and twisted.
There is no marks anywhere to indicate a hard knock to the bracket or the caliper.
All of a sudden a very abnormal pad wear has shown up, these pads where replaced some 5 thousand K's ago just before christmas.
The only reason this fault was found was the pad wear.
Please if you have any abnormal uneven brake pad wear, check this, before total failure of the alloy bracket happens.
Here is some pics, remembering the bracket is shaped, so look at the angle of the caliper slider pin, sorry the quality of the pics aint better, but it should be enough to get the point I'm making, and what to look for.