The silver ones were the good ones. When they started cheaping out and producing plastic ones, the plastic was stiff enough that over time, it caused the adhesive to release, and the tab would fall off.
It produced the same sort of uneasy feeling as a condom with a pinhole in it.
lol, I remember that. The silver ones were thicker and more solid to better push the internal trigger, but even then out here in the southwest we had to double check the stickers every time we used the disk. Just storage in the hot environment demanded it because of the adhesive. They used to like to come off inside the drive and gum things up. When a drive refused to let you write to a disk there was usually a sticker stuck in there on the trigger write-protecting EVERYTHING.
Now I realize this reply could be very misconstrued... lol