For some reasons I'm running into SSL problems since a few days. When trying to clone a git repository for example I receive the following error message:
fatal: unable to access 'https://someuser@bitbucket.org/somerepo.git/': SSL certificate problem: Invalid certificate chain
I was able to solve this issue by setting the following configuration option:
git config --global http.sslVerify false;
But when I try to access github.com or bitbucket.org through chrome I get the following:


Unfortunately it's in german but in short it says that the connection is affected by something. The failure type is HSTS failure. The second screen says that the certificate was signed by a unreliable deliverer.
I'm using Chrome (34.0.1847.116) on a Mac (OS X 10.9.2 (13C64)).
Any suggestions what could cause this issue or how to solve it?