Hi, everyone. I upgrade kdelibs today(3.5.9-3-i686), then all the kde related applications cannot start. The error message is like this: konqueror: symbol lookup error: /opt/kde/lib/libkdeui.so.4: undefined symbol: _ZThn40_NK10KColorDrag6formatEi kmail: symbol lookup error: /opt/kde/lib/libkdeui.so.4: undefined symbol: _ZThn40_NK10KColorDrag6formatEi ...etc. I use fvwm now, the non-kde-related applications works well, such as firefox, So I guess it is the new kdelibs' fault.