Ok, Still there. I Clicked Plugins, Manage Plugins, Keyboard shortcuts, Uninstall. Then exited and restarted C::B.
I don't know what else is likely to try.
You can try my default item to blame which is code completion.
By trying Plugins, Manage Plugins, code completion, disable.
Note: I only meant to disable Keyboard shortcuts NOT Uninstall.
I am not the best person to verify that this issue exists or not, my eyes always sees flickers.
Maybe another person can see the issue if they know where to look.
What sub menu is having the issue?
Tim S