Can not start the kchmpart coming with kdevelop (right click on .CHM file and select view in kchmpart). Nor in the original FC4 installation neither in the installation with all updates. /usr/lib/libkdevwidgets.so.0: undefined symbol: _ZTIN11KTextEditor8DocumentE Please help, do the grep in /usr/lib dir to get the filename which contains the symbol and please send back the output: grep -l "_ZTIN11KTextEditor8DocumentE" /usr/lib/* may take a few minutes.