Hi, I just had the same error happen to me. I checked Brasero's homepage, and noticed that 0.6.1 fixes Gnome bug #466290 http://bugzilla.gnome.org/show_bug.cgi?id=466290 which seems very much related to this problem.
In fact I downloaded 0.6.1 and compiled it locally, and it now works. Here's hoping that 0.6.1 will get into testing, fixing this bug ... -- Alvaro Herrera Valdivia, Chile ICBM: S 39º 49' 18.1", W 73º 13' 56.4" "Nunca se desea ardientemente lo que solo se desea por razón" (F. Alexandre)