Help with valve cover leak....
 

I had the valve cover gaskets replaced to fix a rather obnoxious leak. The replacement fix most of the leak but now it is leaking from the front driver's side corner. I had the mechanic redo it and it did not fix the problem. I know the 2.8L is notorious for valve cover leaks. Is the front corner typical for this problem. Is there a "trick" to remedy this? Is it possible the cover itself is slightly warped causing the leak?

Any help would be appreciated.

Its not the cover, its the chain tensioner in front of it leaking down to the corner.