Very slow import/export in Audacity, oneiric

I tried the version of Audacity in Oneiric and experienced very slow performance on two different computers at home. Exporting a 4 minute track to ogg could take as much as 7 minutes on a Core i5 machine. I then tried the ppa with "daily builds" from launchpad and all of a sudden it worked as "before", with exporting times of around 15-20 seconds. Also importing files improved significantly in terms of speed. There must be something broken in the version that shippes with Oneiric as standard...