I was editing a 'multiline' text object , and I wanted to select all the text content with keyboard shortcut, Ctrl+A while editing ( to change all font, size, etc.... ) . The result : a pop-up "ambiguous shortcut detected" Inside the pop-up : "The key sequence 'Ctrl+A' is ambiguous. Use 'Configure Shortcuts' from the 'Settings' menu to solve the ambiguity. No action will be triggered." A minor glitch.
*** This bug has been marked as a duplicate of bug 273898 ***