The kdebase-1.1.2-33 package installs some files under
/usr/share/locale/en_UK/. But other packages with british localization use
the directory en_GB. Since GB is the official two-letter country code, I
think kdebase is wrong.
The fix would be to rebuild kdebase, moving the stuff under en_UK/ into
en_GB/. The same problem affects kdelibs-1.1.2-15.
This is fixed in 2.1.1.
It's fixed in kdebase-2.1.1-6