k3b jumps ahead at a write speed of 3,980x in both fc3t3 and fc3rc3.

[Kim Lux]

I've had the same problem in K3B in both fc3t3 and fc3rc3:

I'm trying to burn a DVD with just 2 files: a 4.1 GB tar file and a
7.8MB tar file.  I've burned about 4 other disks today and they all work
fine.

K3B starts setting up to write like it normally does.  Then the overall
progress bar jumps to about 75% and displays a ridiculous volume of data
written.  It appears that K3B resumes to normal writing after that.  The
disk finishes at a normal pace, but it is a coaster because the first
80% of the data didn't actually write.

I've made 3 coasters today trying to write the same data: 2 in fc3t3 and
1 in fc3rc3.  It acted the same way in both.