The upgrade to KDE 4.10.5 using Alien Bob's packages went perfectly.
Later, I ran slackpkg update and slackpkg upgrade-all to pick up recently rebuilt packages with security updates (i.e., the glibc, firefox, and thunderbird packages that were announced on the slackware-security list earlier today). slackpkg wanted to "upgrade" all of the packages that were included in Alien Bob's 4.10.5 set back to the 4.8 level.
I blacklisted those packages in the slackpkg blacklist by adding an entry at the bottom:
# You can blacklist using regular expressions.
# Don't use *full* regex here, because all of the following
# will be checked for the regex: series, name, version, arch,
# build and fullname.
# This one will blacklist all SBo packages:
It did the trick, but I'm not sure what the warning about not using *full* regex means. Is the way I added it correct and the recommended way of dealing with this?