KMail 4.81 beta1 Shortcut conflict: Delete mail (Nachricht löschen) and trash mail (In den Papierkorb werfen) have the same default shortcut: Del. Since both are activated in a new installation, a conflict arises which the user has to resolve manually. Reproducible: Always
Confirmed in Arch Linux, Kmail 4.81 beta 1, KDE FW 5.13
Thank you for your report. This is already fixed in Git master. Fix will land in KDEPIM 15.12. For now just remove one of the both hotkeys (I suggest the delete one, as thats safer and also the official fix).