The HOMEPAGE and DESCRIPTION fields for the mongoid ebuild are swapped around. Thanks, James Reproducible: Always
Fixed on the fly + 17 Jan 2012; Agostino Sarubbo <ago@gentoo.org> mongoid-2.4.1.ebuild: + Fix DESCRIPTION and HOMEPAGE, thanks to James Rowe, wrt bug #399175 + thanks for the report
Thanks James and Ago, and sorry ^^;;