Wine depends on corefonts which is formally microsoft product. I suggest to make it optional and use liberation fonts from RedHat, for example, which design as a free replacement of corefonts. There are few other fonts also available as an alternative: http://wiki.jswindle.com/index.php/Fonts#Red_Hat_Liberation_Fonts Suggestion: Verify and do not install media-fonts/corefonts if media-fonts/liberation-fonts-ttf is already installed. ps. I realised that Wine is the only packages left in my gentoo which requires corefonts.
*** This bug has been marked as a duplicate of bug 179538 ***