After updating to wordpress 3.3, primary drop down menus in header menu area gets highlighted on homepage. See the below images for a quick look at the issue.
1. In my main site (http://prasannasp.net), look at Downloads tab.
2. My test site (http://test.prasannasp.net), look at Test2 tab.
3. One of my clients site (it's in Kannada language). Before updating wordpress.
4. After updating the same site to Wordpress3.3
Sorry for posting this under Bug Report. I know, it's not a Graphene bug..