We take security very seriously and therefore react as fast as possible to potential security threats like Heartbleed. Today, we became aware of a similar threat which we already mitigated by applying a security fix to our software. At this very moment, our administrators are already applying the fix to our systems by updating the affected software on all our servers. Interruptions of service are not expected to happen. If you still notice a problem, it is very likely related to this issue and should be resolved soon. Update: All our servers have been protected sucessfully against the new threat. The availability of our service was not affected.