Version: 1.13.5 (using KDE 4.5.1) OS: Linux Pressing Ctrl+C shows 'ambiguous shortcut' warning. However, checking in the shortcut settings, the only action that is assigned that shortcut is Copy. Where is the ambiguity? Reproducible: Always
This may be a duplicate of bug 250296, except for a different shortcut (Ctrl+C instead of J). In both cases it occurred after changing a setting (preferred message format HTML for me, preview layout in the original), and restarting KMail made the ambiguity go away.
I think was fix in 4.10.x