Comment 5 for bug 225465

Question:

How do you map the volume keys to the volume? By default the buttons applet has the XF86AudioRaiseVolume and XF86AudioLowerVolume keys mapped to up and down, however they can be changed to whatever.

I've tried pressing the keys as fast as I can here and I see no issues. Can you try remapping the volume keys to some other buttons (like ctrl-u and ctrl-d) and seeing if you can reproduce the issue in the same manner? I need to know if there's something endemic to the keys you used that cause problems with software.