app-text/poppler-bindings-0.5.4 emerge repeatedly !!!

[padoor]

localhost ~ # emerge -DuavN world

These are the packages that would be merged, in order:

Calculating world dependencies... done!
[ebuild R ] app-text/poppler-bindings-0.5.4 USE="gtk -cairo -qt3* -qt4" 0 kB
[ebuild U ] kde-base/kpdf-3.5.7 [3.5.6-r1] USE="-arts -debug -kdeenablefinal -xinerama" 0 kB
[ebuild U ] kde-base/kicker-applets-3.5.7 [3.5.6] USE="-arts -debug -kdeenablefinal -xinerama" 0 kB
[ebuild U ] kde-base/kdemultimedia-meta-3.5.7 [3.5.6] USE="-arts -xine" 0 kB
[ebuild U ] kde-base/kcontrol-3.5.7 [3.5.6-r1] USE="-arts -debug -ieee1394 -kdeenablefinal -kdehiddenvisibility -logitech-mouse -opengl -xinerama" 0 kB
[ebuild U ] kde-base/kfax-3.5.7 [3.5.6] USE="-arts -debug -kdeenablefinal -xinerama" 0 kB
[ebuild U ] kde-base/kdvi-3.5.7 [3.5.6] USE="-arts -debug -emacs -kdeenablefinal -tetex -xinerama" 0 kB
[ebuild U ] kde-base/kdeartwork-meta-3.5.7 [3.5.6] 0 kB
[ebuild U ] kde-base/konqueror-3.5.7 [3.5.6] USE="-arts -debug -java -kdeenablefinal -kdehiddenvisibility -xinerama" 0 kB
[ebuild U ] kde-base/kdm-3.5.7 [3.5.6-r1] USE="pam -arts -debug -kdeenablefinal -kdehiddenvisibility -xinerama" 0 kB
[ebuild U ] kde-base/konsole-3.5.7 [3.5.6-r1] USE="-arts -debug -kdeenablefinal -kdehiddenvisibility -xinerama" 0 kB
[ebuild U ] kde-base/kdegraphics-meta-3.5.7 [3.5.6] USE="-gphoto2 -imlib -povray -scanner" 0 kB
[ebuild U ] kde-base/kdesktop-3.5.7 [3.5.6-r2] USE="-arts -debug -kdeenablefinal -kdehiddenvisibility -xinerama -xscreensaver" 0 kB
[ebuild U ] gnome-base/gdm-2.16.6 [2.16.4] USE="ipv6 pam tcpd -accessibility -debug (-selinux) -xinerama" 0 kB
[ebuild U ] kde-base/kdebase-startkde-3.5.7 [3.5.6-r2] USE="-arts -debug -kdeenablefinal -xinerama" 0 kB
[ebuild U ] gnome-base/gnome-2.16.3 [2.16.2] USE="cdr cups -accessibility -dvdr -hal -ldap" 0 kB

Total: 16 packages (15 upgrades, 1 reinstall), Size of downloads: 0 kB

Would you like to merge these packages? [Yes/No] y

=======
this stops at kpdf with following error.

>>> Emerging (2 of 16) kde-base/kpdf-3.5.7 to /
* kdegraphics-3.5.7.tar.bz2 RMD160 ... [ ok ]
* kdegraphics-3.5.7.tar.bz2 SHA1 ... [ ok ]
* kdegraphics-3.5.7.tar.bz2 SHA256 ... [ ok ]
* kdegraphics-3.5.7.tar.bz2 size ... [ ok ]
* checking ebuild checksums ... [ ok ]
* checking auxfile checksums ... [ ok ]
* checking miscfile checksums ... [ ok ]
* checking kdegraphics-3.5.7.tar.bz2 ... [ ok ]
* This package requires app-text/poppler-bindings compiled with Qt 3.x support.
* Please reemerge app-text/poppler-bindings with USE="qt3".

!!! ERROR: kde-base/kpdf-3.5.7 failed.
Call stack:
ebuild.sh, line 1631: Called dyn_setup
ebuild.sh, line 703: Called qa_call 'pkg_setup'
ebuild.sh, line 44: Called pkg_setup
kpdf-3.5.7.ebuild, line 28: Called die

!!! Please reemerge app-text/poppler-bindings with USE="qt3".
!!! If you need support, post the topmost build error, and the call stack if relevant.
!!! A complete build log is located at '/var/tmp/portage/kde-base/kpdf-3.5.7/temp/build.log'.

if i do
localhost ~ # USE="qt3" emerge app-text/poppler-bindings

it completes the emerge without problem
but again emerge -DuNav world

emerges the poplerbindings again with the verbose use shown above
gtk (red) -qt4 (blue) -cairo (blue) -qt3 (green)*

and the kpdf stops at the error.
how do i get out of this circle of popler bindings
revdep-rebuild shows consistent

why the already qt3 emerged popler wants to do -qt3 and ask later for qt3?
help needed

this is the last leg of kde-3.5.7 emerge
profile 2007.0 changed from 2006.1 and Dunav world earlier.
_________________
reach out a little bit more to catch it (DON'T BELIEVE the advocate part under my user name)

[desultory]

Moved from Portage & Programming to Duplicate Threads, refer to topic "Please re-emerge [solved]".

As noted in the handbook USE flags specified via environment variables are not retained as persistent settings so, aside from when a given USE flag setting is itself transient in nature, use one of the persistent USE flag setting methods (/etc/make.conf, /etc/portage/package.use). Also, note that USE flags are case sensitive.

After running USE="qt3" emerge app-text/poppler-bindings, app-text/poppler-bindings was reinstalled as part of the update process of emerge -DuavN world due to having its USE flags changed because the USE flags were not persistently set.