Ne1 with compression fittings that have ever leaked?

[Eddie3dfx]

Okay, I know someone who posted on a few blogs that they had problems with leaking koolance fittings, so I wanted to see if anyone has ever had any leaking problems with compression fittings (I'm not talking about jamming wrong size tubing in, but specifically proper tubing to proper fitting.. I also do not mean leaking at the O-Ring, but at the top.)

[BDW88]

I've tried both Feser and BP Comp fittings and no leaks, hard as hell to tighten them all the way down but once there on it's not coming off.

[Hondacity]

i have 16 BP compression fittings, used with the right tubes, they're tight