Tested using the provided steps on Oneiric with banshee-extension-ubuntuonemusicstore 2.2.1-1ubuntu1 and libubuntuone-1.0-1 0.11.0-0ubuntu2 and instead of a 404, got the expected prompt to setup U1 on the computer.
Tested using the provided steps on Oneiric with banshee- extension- ubuntuonemusics tore 2.2.1-1ubuntu1 and libubuntuone-1.0-1 0.11.0-0ubuntu2 and instead of a 404, got the expected prompt to setup U1 on the computer.