Fudge and Curse Scars

[cathywalker75]

No: HPFGUIDX 47275

I've checked through messages to the list and haven't seen any 
reference to Fudge and his comment about curse scars in GoF, but 
this is my first posting- apologies if this has already been 
discussed.

In Fudge and Dumbledore's discussion in chapter 36 (page 613 UK 
edition), Fudge challenges Dumbledore about the pains Harry 
experienced in his scar. Dumbledore expalins,

"...'Harry is as sane as you or I. That scar upon his forehead has 
not addled his brains. I believe it hurts him when Lord Voldemort is 
close by, or feeling particularly murderous.' " (p.612)

It is the subsequent passage that has me puzzled,

"Fudge had taken half a step back from Dumbledore, but he looked no 
less stubbord. 'You'll forgive me, Dumbledore, but I've heard of a 
curse scar acting as an alarm bell before...'" (p613, UK edition)

Does anyone have any ideas as to who's curse scar he is referring 
to? Why does Dumblesore's information about Harry's scar make Fudge 
take a step back, what event was this other scar associated with?

How common are curse scars? Harry is the only person to have 
survived the adava kedava curse, so do scars from different 
(unforgivable?) curses have different properties? Are there 
connections between the ways in which curse scars and the Dark Mark 
operate (Harry and Lord V are linked by the curse that failed, Death 
Eaters are linked to Lord V by the Dark Mark)?

Any ideas?  

Cathy