Anyone else have an issue with the KDE 4.8.2 upgrade to 4.8.5? Attempts to launch Konqueror result in an error message "plugin libkhtmlpart uses an incompatible KDE library (4.8.5 (4.8.5))". Also, severel widgets now appear as "Unknown widget"

Notes:
I used the KDE4 Meta package to initiate the upgrade.
I've verified that a new /usr/lib64/kcm_konqhtml.so has been installed.
I created a new user & removed said user's ~/.kde4 directory to force that to be created (trying to ensure no remnants remain).
I've ran kbuildsycoca4 & kbuildsycoca4 --noincremental several times.
I'd greatly appreciate any suggestions on -- where else to look / what else to try -- .