http://files.xvid.org/downloads/xvidcore-1.0.3.tar.bz2 Simple bump of 1.02 ebuild is enough
Personally, I had to move files/1.0.2-DESTDIR.patch to files/1.0.3-DESTDIR.patch, and comment out the two lines in the ebuild referring to files/xvid-1.0.1-64bit-clean.patch. However, I am running on AMD64, so that might be the cause of the differences. Compiled cleanly, and appears stable. I'm on the first pass of a long two-pass encoding, so I have no indication as to quality as of yet; if any problems appear (perhaps as a result of the removal of the second patch) I'll be sure to post back here.
new version now in the portage tree. it seems that as of version 1.0.3 the 64bit patch isn't needed any longer.