It is not repeatable in a live environment and I have no idea why it should be?
Ubuntu doesn't ship with the A52 plugin by default as there are some patent issues I think.
However this is compilable from the source available from the repos.
Luke Yelavich has also reported this bug upstream and it appears to be to do with the Alsa plugin itself so this bug should be confirmed.
It is not repeatable in a live environment and I have no idea why it should be?
Ubuntu doesn't ship with the A52 plugin by default as there are some patent issues I think.
However this is compilable from the source available from the repos.
Luke Yelavich has also reported this bug upstream and it appears to be to do with the Alsa plugin itself so this bug should be confirmed.