Mutagen 1.19 was released on Feb. 18 with various bug-fixes. Reproducible: Always
*mutagen-1.19 (13 Mar 2010) 13 Mar 2010; Arfrever Frehtes Taifersar Arahesis <arfrever@gentoo.org> -mutagen-1.15.ebuild, -mutagen-1.16.ebuild, +mutagen-1.19.ebuild: Version bump. Set SUPPORT_PYTHON_ABIS. Disable installation with Python 3 (bug #306367).