There's a new firmware update for the Pioneer 108. It fixes the problems were DVD+R DL media is not seen correctly in Toast unless the media is in the drive when Toast is launched.

http://wwwbsc.pioneer.co.jp/product-e/ibs/device_e/dev00001r_e.html#firmware1

Other things:

DVD-R Writability Improvement
+R Writability Improvement
+R DL(DoubleLayer) Writability Improvement
CD-R Writability Improvement
Ultra Speed CD-RW Writability Improvement
DVD Playability Improvement
CD Playability Improvement