Hi !
indeed, when I run OD on my Win7 x64 machine, Opera (10.x or 11) gets frozen.
Moreover Opera is using about 60% of CPU... but other apps (including OD itself) are still working fine.
I have no problem at all with Opera, when OD is off.
And, when OD is running, all other apps are working perfectly ; with the exception of Opera.
Any idea ?