Hmm, thats a new one. Close the cowl flaps, bring the mixture back and see how hot you can get those cylinders
I would be inclined to go full rich in a climb, but I suppose this depends on altitude and temperature, yada, yada, yada. As mentioned, sometimes you lean before take-off, so if you're at an altitude where this is nescessary, then its probably best to lean a bit in the climb, assuming you need full performance. This depends on how hot the engine is getting though, if its getting hot, go a bit richer to help it cool down....
Just my view, I'm not sure there is a definitive "right or wrong" in this discussion.
EA