Error: "/var/tmp/kdecache-user" is owned by uid 1000 instead of uid 0.

После emerge некоторых пакетов(например smplayer, firefox) выскакивает много сообщений такого типа:

kded(3331)/kio (KDirWatch) KDirWatchPrivate::useINotify: trying to use inotify for monitoring                                                
kded(3331)/kio (KDirWatch) KDirWatchPrivate::useINotify: inotify successfully used for monitoring                                            
kded(3331)/kio (KDirWatch) KDirWatchPrivate::addEntry: Added File "/usr/kde/4.1/share/kde4/services/trash.protocol" for "" ["KDirWatch-53"]  
kded(3331)/kio (KDirWatch) KDirWatchPrivate::useINotify: trying to use inotify for monitoring                                                
kded(3331)/kio (KDirWatch) KDirWatchPrivate::useINotify: inotify successfully used for monitoring                                            
kded(3331)/kio (KDirWatch) KDirWatchPrivate::addEntry: Added File "/usr/kde/4.1/share/kde4/services/userfriendlyprovider.desktop" for "" ["KDirWatch-53"]           

а потом:

kbuildsycoca4 running...
Error: "/var/tmp/kdecache-user" is owned by uid 1000 instead of uid 0.
kbuildsycoca4(22546)/kdecore (KService) KBuildServiceFactory::collectInheritedServices: parent mimetype not found: "text/xml"
kbuildsycoca4(22546)/kdecore (KService) KBuildServiceFactory::collectInheritedServices: parent mimetype not found: "text/xml"
kdeinit4: PID 22546 terminated.
kded(3331)/kdecore (KSycoca) KSycocaPrivate::openDatabase: Trying to open ksycoca from  "/var/tmp/kdecache-user/ksycoca4"

и на этом месте виснет наглухо. завершаю по ctrl+c, никаких видимых последствий нет, но осадок остается.
Запускаю через sudo emerge.
Подозреваю, что это из-за sudo. Никто не знает как это поправить?