I am baffled. This happens after I switch to "meta-repo" from "ports-2012". I tried several packages, euse can't see packages flag. For example, the following is for xorg-server:
# euse -p "x11-base/xorg-server" -E "xephyr"
ERROR: USE flag "xephyr" does not exist
# equery u xorg-server
[ Legend : U - final flag setting for installation]
[ : I - package is installed with flag ]
[ Colors : set, unset ]
* Found these USE f