Just checked mine and I also have the same problem.Mine is leaking on the front timing belt cover as well. I pulled the cover off and the belt was dry. The cam seal must be leaking or something. Be careful if you remove the cover. You have to remove the exhaust to take it straight off. If you don't have the exhaust off you can only pull it away to inspect the belts. And if the edge of the timing belt cover touches the belts or tensioners you will deposit oil/grease onto them. So if you don't trust yourself, don't take the timing cover off.
How many of the rest of you have oil wetness along the front timing belt cover??