It looks like if in the MP3 export options you choose "Joint Stereo" instead of "Stereo", this problem goes away.
However, there are other serious data loss issues with 1.3.7 that I'm in contact with the Audacity devs about which would make me strongly recommend against using it or including it in Ubuntu prematurely. -- Audacity adds audio artifacts to MP3 files https://bugs.launchpad.net/bugs/295072 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
