Just updated Opera to the latest build 12.00 and have noticed that WSA blocks Java's plugin (having Java SE 7 update 5). There is no other solution than to move Opera from Protected to Allow. Today, before update to Opera 12.00, no problems experienced, i.e. Opera set to Protected and Java plugins worked correctly.
However WSA doesn't block Java in IE9 even if IE is set to Protected. It looks like that this issue is somehow related to today's release of new Opera 12.
Thanks & regards,
EDIT: have noticed that not only Java plugins are being blocked but also Flash Player plugins. It seems that WSA blocks all plugins across my Opera unless Opera is set Allow.
Best answer by pegasView original