I think something has definitely changed. Way too often the results of a particular shot are no where near the expected results - so much so that I call 'Bull Sh!t' on the game. If you hit a shot perfectly square and perfectly straight, and all of a sudden it pops off your club at a right angle, something's not right. And if we don't know what it is that is causing it, than it's not fair. I've taken to not moving the aiming arrow on my shots, and instead over-compensating for wind (and break on putts) by either massively hooking or slicing my shot. The results are slightly better as far as not having the shot go overly askew, but who knows if that is the reason. It might just be wishful thinking that I can actually have an impact on where my shot is going.
And don't even get me started on the short game. What's the deal with the club distances when pitching and chipping? Are they mere suggestions? And I don't know about any other golfers out there, but when I'm on the course and hit a flop shot, it doesn't come off the club looking like I putted it. I mean, come on!