Newest flashplayer in Iceweasel on Debian crashes browser

Is any body else having severe trouble with the latest Flashplayer 11.2.202.554 for Mozilla/Iceweasel-38.4.0 on Debian-15.2 ?

It was working "well enough" with 11.2.202.548, but now the browser crashes consistently when flash content is on a page. When it doesn't immediately crash, like on the adobe-test page, the cloud animation does not show.

Also the standalone program, Projector, does not run at all.

$ ./flashplayer --version

Vector smash protection is enabled.

11,2,202,554

any attempt to load a .swf game locally results in

Illegal instruction

and it crashes out.

What gdb backtrace or library information would be helpful?

$ cat /proc/version

Linux version 3.16.0-4-686-pae (debian-kernel@lists.debian.org) (gcc version 4.8.4 (Debian 4.8.4-1) ) #1 SMP Debian 3.16.7-ckt11-1+deb8u3 (2015-08-04)

glxinfo is long, but the graphic driver is nouveau