I just developed this problem today. My keyboard will not work withOpera, it is fine with any other program. I re-installed Opera and thatdidn't help.
This is a weird one. Opera offers extensive keyboard shortcuts and this mayinterfere with your keyboard and how it is configured. This is only a guess andI am not sure how or why, though. Since I can't replicate it, I am at a loss asto how to get around it. I would start by looking at Tools| Preferences inOpera, Advanced tab and Shortcuts in the list, using the mouse of course andtrying to delete shortcuts.You could also try running Opera from the commandline. See:http://www.opera.com/support/mastering/sysadmin/ and look at the switches here:http://www.opera.com/docs/switches/I notice that there is a keyboard debugging switch. Once you decide what worksthen you can just edit your menu to reflect the launch command for Opera.
I found an answer to my problem, I need to be in Canadian English, notAmerican English for Opera to work.