konqueror video thumbnails and some gentoo updating thoughts

yesterday i finished updating one of my gentoo boxes after ~2 months (through emerge -uD world).
it required hand-tweaking 2 times.

1. udev update. one needs to do "rm -rf /etc/udev" before doing "emerge udev" in order to get rid of all those error messages during boot;
2. dbus update. it is due to my config: i don't have ~x86 in /etc/make.conf, but still have many packages listed with it in /etc/portage/package.keywords (like kde, nvidia drivers, gtk2, beryl and many more). i had dbus there too, and it caused a conflict, so i was forced to fallback to stable dbus and do emerge -e system && revdep-rebuild.

and one more thing..
some time ago i tweaked my useflags and lost video thumbnails in konqueror.
now i've found out which useflag and package was responsible for that - it's "xine" useflag and kdemultimedia package.