XFCE version: 4.8.3 on Ubuntu 12.04. 1. Open XFCE -> Settings -> Settings Manager. 2. Click on window manager 3. Switch to keyboard tab Bug: Buttons Clear and Close has the same keyboard shortcut: Alt+C. Clicking on Alt+C closes the dialog, there is no ability to invoke clear using keyboard.
The bug still exists in 4.10.
Thanks for your bug report. I'm marking this as a duplicate ; the fix is not trivial as those buttons are both stock GTK+ buttons. *** This bug has been marked as a duplicate of bug 8232 ***