In the control panel, when I click the "font installer" option, I get this popup.
The diagnostics is:
/opt/kde/lib/libkfontinst.so.0: undefined symbol: FTC_SBit_Cache_Lookup
An error occurred during your last KDE upgrade leaving an orphaned control module
You have old third party modules lying around.
Check these points carefully and try to remove the module mentioned in the error message. If this fails, consider contacting your distributor or packager.
Help apreciated. Thanks.