Version:           kopete-4.0.0-r1 (using KDE 4.0.0)
Installed from:    Gentoo Packages
Compiler:          gcc 4.1.2 (not sure) 
OS:                Linux

I know that this bug has already been resolved and I hope you will read it until the end, before moving it away :)
So I can't add any account because it's complaining about missing libraries... for example: "Cannot load the ICQ protocol plugin"

I tried removing     /var/tmp/kdecache-$USER/ksycoca4stamp  /var/tmp/kdecache-$USER/ksycoca4 , then logout and logout, but it didn't help. Then I tried kbuildsycoca4 --noincremental, then restart kopete, but still the same error.

hope this should be helpfull

QEventDispatcherUNIX::unregisterTimer: invalid argument
kopete(28719)/libkopete Kopete::ContactList::setSelectedItems: 0  metacontacts,  0  groups selected
kopete(28719)/libkopete KopeteSystemTray::KopeteSystemTray:
QObject::connect: Connecting from COMPAT signal (KAction::activated())
kopete(28719) Kopete::Global::Properties::Properties:
kopete(28719) KopeteWindow::slotIdentityStatusIconChanged: QVariant(, )
kopete(28719) Kopete::IdentityManager::load: Created identity  "dF9KpYIfHX"
kopete(28719)/libkopete Kopete::PluginManager::loadPluginInternal: Successfully loaded plugin ' "kopete_chatwindow" '
kopete(28719)/kdecore (KLibLoader) KDEPrivate::ConcreteFactory<Product, ParentType>::create: className= Kopete::Plugin  metaObject->className()= HistoryPlugin
kopete(28719)/kdecore (KLibLoader) KDEPrivate::ConcreteFactory<Product, ParentType>::create: className= Kopete::Plugin  metaObject->className()= Kopete::Plugin
kopete(28719)/kdecore (KLibLoader) KDEPrivate::ConcreteFactory<Product, ParentType>::create: create - 3
kopete(28719)/libkopete Kopete::PluginManager::loadPluginInternal: Successfully loaded plugin ' "kopete_history" '
kopete(28719)/libkopete Kopete::PluginManager::loadPluginInternal: Successfully loaded plugin ' "kopete_emailwindow" '
kopete(28719)/libkopete Kopete::PluginManager::loadPluginInternal: Loading plugin  "kopete_icq"  failed, KServiceTypeTrader reported error:  "No service matching the requirements was found"