I got the same,I automatically assumed it was FP.
I updated my AVG 7 free virus definitions today and did a scan.
AVG came up with a virus detection for Win32/Mkar.k virus in my ...\EA Sports\Tiger Woods PGA Tour 2004\Support\Tiger Woods PGA Tour 2004_EZ.exe
Weird, as this is a retail game I purchased last year and have played many times, and had scanned many times by AVG, Spybot, Ad-Aware and MSAS without any problems.
I came up with these sites when I Googled Win32/Mkar.k
and it seems this may be a false positive by AVG on some EA Sports games, although AVG Tech Support haven't yet said so, and have suggested to one other person that his EA Sports game, (a different game), might be a cracked version.
So, just to let others know, that AVG 7's recent definitions update may display a false positive.
Unless, of course, it's already been mentioned...........!
My false positive is quarantined for the time being, but the game still seems to play ok. I beat Tiger Woods, yet again!