Some times i can't make Opera to get the focus from System Preferences (or other Mac apps). I have Opera window maximized, but still i've got System Preference application focused (main menu bar shows SysPref name).
The only way for me to switch the front application is to click on Opera's icon in the Dock.
I wonder if it's common browsers decease to have poor focus switching?!

Without proper reproducable test, it's impossible to say, if LCL requires changes.