I looked around before asking this and no one seemed to have this particular problem...
I have an Inspiron 8200 with Slack 9.1 and version 2.4.22 of the kernel running on it. Everything boots up fine and generally, 99.5% of the time, everything is beautiful. Every once in a while, and I haven't determined that there is a pattern involved here, everything will freeze, the mouse, keyboard, the display, gkrellm, all of it. I sit patiently and after about 7-8 seconds, whatever was locking everything down releases it and the laptop now functions normally.
This doesn't happen after any particular event (such as boot up or KDE logon). I'll just be working away and won't even notice until my moving the mouse gets no response from the on-screen cursor.
I've checked over the /var/log/syslog and /var/log/messages for any indication that there might be a boot-up problem, but nothing stands out.