I hope this is still valid:
http://www.linuxquestions.org/questi...amd-64-640410/
as I lost track a bit about the numerous version updates. Since 9.50 I haven't had serious problems with Flash, right now I am using 9.63/9.64 suprisingly few problems.
The instruction I wrote are valid on both 32-bits and 64-bits platforms.
If this fails, refer to the forums on my.opera.com and choose Linux specific forum.
jlinkels