Sorry, I feel like I've been posting left and right recently, but I'm deep into working on my bike
Anyway, I was putting the valve cover back on and tightening down the bolts when I heard a crack. One of the valve cover bolts broke off and the threaded part remained in the screw hole, but I think I can get it out with some vice grips.
And no, I wasn't tightening it down too much--it was barely getting snug when it snapped.
In any case, anyone know where I can get some sturdier bolts? I heard someone say that they got titanium ones?