@Cyberdragon,
It certainly sounds like something is wired incorrectly. Call your landlord. If he doesn't respond then whether you can repair it and charge it back to the landlord will depend on the jurisdiction. (Most places in the US will probably allow you to do it.)
Danger is another question entirely. Considering we don't know how long this situation has existed, we don't know. As long as the electrical has standard fusing of some kind, I doubt it is too dangerous as far as fire. The greater danger is in electrocution from the wrong wires being hot if someone is working on it.