Hasn't there been a recent interpretation or change (don't have my casebook) that implies that any time a player throws the ball against his own backboard it should be treated as a try for goal?

Yes, 9.5 (iirc)

Thanks. It's been that way in my mind, but I couldn't remember if it was something I read or something I was taught. Or something my mind made up on me.

Any of the three was possible. ;)

Also, Basketball Rule Fundamental #19: "A ball which touches the front face or edges of the backboard is treated the same as touching the floor inbounds, except that when the ball touches the thrower's backboard, it does not constitute part of a dribble."

I know this has been discussed at great length and there are still disagreements about it but I think it's worth noting that 9.5 does not say "any time a player throws the ball against his own backboard it should be treated as a try for goal." Some may think it implies that but that is their own interpretation.

9.5 states; A teams own backboard is part of that team's equipment and may be used.

4-4-5 states; When the ball touches the thrower's backboard it does not constitute part of a dribble.

These are the only two references (rules or case) that I can think of right now that state anything about using your own backboard other than during a try. I'm not completely convinced that these statements imply that any time a player throws the ball against his own backboard it should be treated as a try for goal.

I agree. But, I do think they mean "A1 has lost player control and may regain player control and dribble again"

Talladega Nights
 

Admittedly, I haven't convinced myself of what the Fed expects of us here, but I do know how I am going to call it. Although I'm not going to say how just yet, but I would like to add thought for more disagreement.

This dialogue from Talladega Nights comes to mind

Ricky Bobby: "I said with all due respect"
Dennit: "That doesn't mean you get to say anything you want"
Ricky Bobby: "Sure as heck does, it's in the Geneva Convention, look it up"

I don't think throwing the ball against your own backboard allows a player to break any of the other rules. In my mind it would be just like throwing the ball into the air and it doesn't touch anything. If the ball didn't touch or wasn't touched by another player, we wouldn't allow a second dribble.

These thoughts are as if the throw was not a try. If your feet moved in excess of the limits, it would be travel. If you had already ended your dribble, threw the ball against your own backboard then dribbled again, it would be an illegal dribble. If you were being defended and had not used your dribble, threw the ball over the defenders head against your own backboard, ran around the player and caught the ball, it would be a travel (illegal dribble last year).

Any way, you get the point. I can't wrap my head around why throwing the ball against your own backboard doesn't stand alone as just that, throwing the ball against your own backboard. For some reason, we have stretched it out there to mean we can break other rules once we have recovered it. maybe it's in the Geneva Convention. I'll look it up. :)

Just Don't Call Me Late For Dinner ...
 

The shooter can retrieve his or her own airball, if the referee considers it to be a shot attempt. The release ends team control. It is not a violation for that player to start another dribble at that point.