I have also experienced issues with Italian style bottom brackets. My Colnago Chic would suffer from a loosening of the non-drive side. I looked at Lock-Tight but refused to use it as the red and blue stuff (and virtually all types) are unsafe with plastic. There are quite a few BB out there which have a non-drive side plastic cup, as in my case, which meant this threadlocker was unsafe. This might be becoming more popular as a weight saving measure. In any case, I found VC-3 Threadmate Threadlocker Vibra-Tite online, which was safe to use with plastics. My intention is to remove this stuff one day and not have a broken cup or BB full of hardened goo. It also helps reduce vibration, which is good on my bike as it is aluminum.

I have learned through forums such as this that over tightening and various threadlockers can help remedy this problem. I too love the style of the Italian bikes, it truly makes them stand out in contrast to the competition. If you like an Italian bike stick with it. There will always be bugs here and there to sort out, some larger than others.