Hi, 4thhorseman,
The Colt frames are not as sturdy as they look, because so much is cut away. When one of them is dropped hard, the grip frame can bend enough to disturb the interface between the rebound lever, which is mounted in the middle of the grip, and the bolt, throwing the revolver out of time. (The rebound lever cam operates the cylinder bolt, and it is a delicate interface at best.) This rarely, if ever, happens with the more solid frame of the last guns, but the old "thin grip" guns were very much prone to it and so were some of the later ones.
Revolvers can be more subject to problems than one might think if handled harshly. Police who carried them were told not to use the revolver as a club, that that is what blackjacks and "batons" were issued for. Whacking a BG with the butt of a revolver can bend the frame and even striking him with the barrel can twist the frame. Contact with the cylinder can spring the crane as previously mentioned.
Those problems have not gone away with the adoption of auto pistols, and the business about using a baton or blackjack is still good (though chemical spray is more likely to be used today, and some departments have banned blackjacks). I know of one cop who hit a BG with his Glock and (to his horror) watched the slide pop off and fall to the ground. Before the Glock haters jump on this, be it noted that pistols are not designed to be clubs; if one must use a club, use a club, not a pistol.
Jim