Version was released a few days ago. Renaming the 0.54 ebuild works, both for installation and in operation with claws-mail CVS on two ~amd64 systems.
libetpan-0.56 released 2008-09-02. build without changes in ebuild
Added to CVS.
0.57 is out now, renaming the ebuild works for me.
Really recylcing this bug, we need 0.57 for the newest Claws Mail release
Bumped in tree.