I did encounter the bug after installing the new package (gst-plugins-base0.10 0.10.36-1ubuntu0.1), using Rhythmbox with crossfading disabled, going from mp3 to ogg.
I did encounter the bug after installing the new package (gst-plugins- base0.10 0.10.36- 1ubuntu0. 1), using Rhythmbox with crossfading disabled, going from mp3 to ogg.