We’re not in Beta 2 territory here, but the folks at Opera have updated their Mobile v9.5 beta browser with a notification sound fix.

From the Opera Mobile blog:

We have updated the beta1 with a fix for the (very annoying) bug that turned off the notification sounds. The notification bugfix was relatively trivial and had a low risk. We are aware of the other bugs and issues, but these aren’t addressed in this update.

Visit the Opera Mobile web page to download the new build of Beta 1.