I didnt find any recalls. I modified the charger with some legs so that it would sit off the table a little that way i could get air flow on all four sides. We'll see if that makes much of a difference.
I have an HP Pavilion dv7. My charger started doing that, I called in to get a replacement ( still under warranty) 2 days after I got the replacement my original died. Call them NOW.
If yours is getting too hot to handle, take it back and get another one. The factories don't want to cause a fire and get sued. They should replace it.