I'm running Eclipse Juno and this is the keybinding bound to Ctrl+Shift+B according to the preferences menu:
Yet when I hit Ctrl+Shift+B, Eclipse pops up this conflict dialog window in the lower right corner of the IDE:
I've tried clearing and reassigning the "Toggle Breakpoint" function to no avail. I've also checked the "Toggle watch" function but that is not the problem. I've also tried restarting Eclipse.