This happens to me with the latest version of notify-osd 0.9.5-0ubuntu1
But this happens because right now, due to bug 343553, brightness notifications are treated as asynchronous notifications, rather than synchronous. When this bug is fixed, volume & brightness won't appear at the same time.
I still prefer not set it as invalid, just in case it is related to a corner case that it is worth having a look.
This happens to me with the latest version of notify-osd 0.9.5-0ubuntu1
But this happens because right now, due to bug 343553, brightness notifications are treated as asynchronous notifications, rather than synchronous. When this bug is fixed, volume & brightness won't appear at the same time.
I still prefer not set it as invalid, just in case it is related to a corner case that it is worth having a look.