Hey Armin,
I actually got the same problem with a site i am working on right now (www.lillykirsten.com). Suddenly all links are not working correctly, furthermore there is a "faux bold effect" around the project title hover (which i think was mentioned in another thread as well).
I looked at the site in safari 9.1.1. and chrome 51.0…
What can I do to fix this? =)
Thanks for your Help man!