don't know what to tell you
I've burned a number of CDs this way.
Hmm - by chance have you upgraded your burner? I know you can't use just any old CDRW with OS X. Different models will have various levels of support and may work with some, but not other, programs under OS X. Back when I had the G3 I upgraded the CDRW and made sure I got one that supported all the programs.
Darrell Spice, Jr. Trendy yet complex\nPeople seek me out - though they're not sure why\n[link|http://spiceware.org/gallery/ArtisticOverpass|Artistic Overpass] [link|http://www.spiceware.org/|SpiceWare]