Although a bent .22LR round is a wasted shell, it's highly unlikely that it could detonate. If caught in just the worst possible positon it could possibly lead to an out of battery detonation, which could be dangerous. The likelyhood of this happening is very low, but nothing is completely impossible concerning mechanics.
What kind of ammo were you shooting? How many rounds through the pistol, thus far? How many rounds had it been since the chamber had last been cleaned (even if just pulling a bore snake or brush through it)? Could the round that stuck been dirty? How many rounds since that incident have run without a repeat? My first action would be to figure out if the cartidge stuck in the chamber, or if the extractor didn't grab the case rim properly. If the latter, disassembly and a good cleaning may resolve the issue.
If it makes you feel any better, both of my SR22 pistols have run over 2k rds without incident. The only issue I've ever had was failure to fire, which was a bad cartridge. It wouldn't go off in another pistol or in the rifle I had with me that day, either. SR22's in general, have an outstanding record, IMO, especially for a brand new design that's only been out on the market for 2.5 yrs. There was an issue with the takedown levers on a few pistols coming apart very early on, but Ruger caught and fixed that pretty quickly.
My suggestion? Keep running the pistol for at least a couple of hundred rds to get it broken in, keep it clean and lightly oiled, and see if the problem reoccurs. If it is more than a once in a blue moon occurance, I'd call Ruger and see what they say. Their customer service has a great rep, and any problem I ever had with one of their products was quickly resolved.
Good luck and keep us posted!