growisofs failed to change write speed

["Christopher J. Bottaro" <cjbottaro@alumni.cs.utexas.edu>]

hello,
i'm trying to burn a dvd iso (or copy a dvd on the fly) with growisofs and
it bombs out saying it failed to change the write speed from 4x to 8x.

"dvd+rw-mediainfo /dev/cdrom1" reports 8x writing speed, but "cdrecord
-prcap /dev/cdrom1" reports a max write speed of 4x.

i have an nec 2500a and i'm using 8x media.

any suggestions?  thanks for the help.

p.s. as for versions, i'm using what came standard with fedora core 2
(actually, they might be updated).