I just upgraded my Slackware 11.0 install to Slack 12.0 and I've found that KDE's Konsole doesn't show up properly in the KDE taskbar when there are multiple Konsole windows. I have the taskbar set to group similar tasks, but Konsole doesn't group. All other apps do.

I've found this is a known bug with KDE 3.5.7 and it has been fixed. See KDE-Forum.org | Administration | Group Similar Tasks "Always" and konsole.
I've applied all the latest patches for Slack 12.0, but the bug is still there. Is there a fix for this?