when compiling kdelibs RC 5. Drops out complaining directory /var/tmp/portage/kdelibs-3.1_rc5/work/kdelibs-3.1_rc5 does not exist. In fact a directory called /var/tmp/portage/kdelibs-3.1_rc5/work/kdelibs-3.1rc5 exists instead. Note the missing underscore at the end.
This bug was fixed really fast. No point in keeping it active.