Yes, I have same problem ! But it's possible to burn multissesion CD. After you load session an add new data (now you can see old&new data) you must mount CD-Rom (click on Places --> Computer and CD-Rom) and when you open cd than you can start burning !
But same solutions of the problem could by fine :D Nice day. -- Unable to burn multisession disk https://launchpad.net/bugs/71684 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs