I visited Korean Wikiquote (http://ko.wikiquote.org) in monobook skin. All text (even in editform) is rendered in serif font. I checked MediaWiki:Common.css and MediaWIki:Monobook.css and found no error.
Text rendering in modern skin was OK. but problem is monobook skin. I think Internet Explorer 8 is making error in rendering.
Microsoft Developer centre peovides the manual here -> http://msdn.microsoft.com/en-gb/library/cc817574.aspx I hope this page would be helpful. Thank you!
Version: unspecified
Severity: enhancement
OS: Windows XP