I ran that test that Kerodos mentioned at http://bcheck.scanit.be/bcheck/
and I was able to save the wav file, but crashed shortly after saving the midi file. I checked my hard drive and the midi file is there.
That doesn't tell me much of anything though, I don't know anything about the tests it's performing. And any site can say it's running a security test. For all we know it could be someone who's against the open source concept. Far-fetched I realize.
More likely that it's a bug in KM, but personally I don't feel that a site running a security test that causes my browser to crash is incontrovertible proof of a bug. Here's what I caught before km crashed.
K-MELEON caused an invalid page fault in
module TOOLBARS.DLL at 0187:018f2be6.
EAX=6e656d75 CS=0187 EIP=018f2be6 EFLGS=00010202
EBX=00000010 SS=018f ESP=0067f2b8 EBP=00000000
ECX=007c04f0 DS=018f ESI=00000000 FS=2abf
EDX=018f2b70 ES=018f EDI=0000055c GS=400f
Bytes at CS:EIP:
39 78 34 74 0b 8b c8 8b 40 30 85 c0 75 f2 eb 32
00000000 0000055c 00000000 00000010 018e1832 0000055c 00000010 00000000 00000000 0000055c 00000010 0000055c 000013f4 007d83b0 0185b2a9 0185b2a9