brasero fails to copy second DVD

[mimosa]

When copying a DVD to a blank disk, all is fine, but Brasero fails when I then try and copy a different one. Rebooting Salix solves the problem, which is no trouble really but cumbersome. I suspect this may be happening because Brasero stores a copy of the disk as a temporary file, and there is then not enough room for another one (though according to file manager, what i thought likely places such as /tmp and /home appear to have a few GB spare). What I haven't tried (and can't till I have another one to copy) is just closing and reopening Brasero, which would be less anoying than rebooting Linux. If I knew where it put its temporary files, I suppose I could delete whichever seemed likely to be the cuplrit, but that's also a bit ad hoc.