My favorite problems are the ones that were prevented from ever occurring. I had a little time to kill so I decided to check on some screws in links of a couple heavier watches. Guess what? I found about 5 screws that needed a little tightening in the first watch! They weren't very loose or anything but they were headed in that direction.
Just a little heads up here. Check all your links on all watches every once in a while (and certainly the heavier ones that put extra stess on bracelet links and screws).