I don't know if others have had a lot of trouble with Opera mobile 8.65 b2 crashing when it loads big pages, but basically for me if a page had more than about 350 kb of data and image intensive, Opera would lock up the phone requiring battery removal.
I found that changing the value "Set File Writer Thread Priority=1" to "Set File Writer Thread Priority=0" makes all the difference.
I also moved my cache to my storage card, but this doesn't make a difference to me for stability
link to original article
http://my.opera.com/community/forums....dml?id=187291
HTH and I haven't had a crash yet since I made the change and this had been intensely used hitting a lot of intensive pages.