May not be anything, but did you replace the symlink in /usr/src/ for linux to the source for 2.6.10? I found that if you don't point the programs to the source some don't work.
I'd go and ln -s /usr/src/linux /usr/src/2.6.10 just a thought

Update: k3b 0.11.19 is fixed for 2.6.10. Back to 2.6.10 for me again.

The udev rules must be comma delimited with no spaces. The site I went to was misleading on this issue. This has allowed me to mount both of my pen drives. However, I still cannot get my SD flash memory card to work.

Below is the output of dmesg. This is quite suspicious, because it seems to think my USB card reader is an ethernet card or something.
And below is the pertinent line from my rules file:
This creates a symlink /dev/flash that points to /dev/sda and a /dev/flash0 that points to a character device /dev/sg0. It doesn't recognize any partitions (i.e., my actual card itself), which I would expect to be something like /dev/sda1. I don't know where I'd find the mounting point, if it exists, or if it doesn't exist, how I would allow it to mount.

I just set up my cups server on my slack 10 box and it was a snap.
First I uncommented the paralell printer section in /etc/rc.d/rc.modules file.
(I don't know if I needed to do this but I did it any way.)
Next I rebooted and the system spotted my printer right off the bat.
I went to settings > control center > peripherals > printers and clicked add...
Printer works!
Slackware is a full featured system and most things can be set up without the radical approch.
I do a full install and most anything I need is already there.
For example: You can turn the arts system off in control center then type killall -9 artsd
This is how I would get rid if arts sound.
After install I always type mail to see the latest advice from Volkerding. This showed me how to set my ide cd-rw drive to scsi so I could use it to create / burn cd's using cdparanoia, mkisofs, cdrecord.
See the man pages and /usr/doc/cdrtools...
Lots of good ideas in the slackware install forum under how I do it.
I have tried lots of distros, but I keep coming back to slack because I think it is the best!
Good luck.

actually ALL of the later ones break it.. it was decided that scsi emulation was evil/stupid and was removed, that's why it didn't work.. luckily for me I have an older extenal scsi burner as well as an internal ide one

About the xmms/xine problem: alsa in general doesn't like outputting sound from two sources at once. As earlier mentioned you might want to disable arts/kde sound, and you also might want to take a look at something like dmix (gentoo guide, might be helpful: http://gentoo-wiki.com/HOWTO_ALSA_sound_mixer_aka_dmix). But do you really need sound from xmms and xine at the same time?

Hmm. I never had SCSI emulation enabled in the first place (at least I don't think so). In my kernel config SCSI CDROM support is disabled. However I do have IDE/ATAPI CDROM support compiled into my kernel. I may have to download the 2.6.10 source and see if that disables k3b on my system.

I believe you will need SCSI emulation for USB and Firewire drive, am I right?

I think you're right, but since I don't have firewire on that box and I don't use SCSI disks, I'm not sure.

Update. Only #1 and 2 left!