Sorry for the slow response; the machine's been relegated to running IPSEC testsuites.
Using a fresh 7-beta user-land, a current kernel, and firefox24(?) from pkgsrc:
- it doesn't seem to crash (at least for the hour i used it)!
- cat videos on youtube work
unfortunately, the scrambled image problem still seems to be there. Easily spotted while looking for cat videos on youtube.
(hmm, I'd better re-confirm that the scrambled images go away once accel is turned off)